Foot bath liquid medicine for treating skin itch and preparation method thereof

Abstract

The invention provides a foot bath liquid medicine for treating skin itch and a preparation method thereof. The effective components of the foot bath liquid medicine comprise gypsum, raw ephedra, rhizoma atractylodis, jujube, raw liquorice, cortex dictamni, poria peel and exocarpium benincasae. By means of the effective components, the skin itch of a patient can be effectively treated. The foot bath liquid medicine is more convenient to use and beneficial to long-term persistence of a patient, so that a better itching relieving effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of traditional Chinese medicine, and particularly to a foot bath potion for treating skin itching and a preparation method thereof. Background Art

[0002] Patients with renal failure are prone to toxin accumulation, which stimulates nerve endings and causes itching. At the same time, such patients usually need to receive hemodialysis treatment, and the dialysis process will cause the loss of skin oil, resulting in aggravated skin itching. At present, the treatment methods of western medicine dermatology usually require high costs. When treating this skin itching with traditional Chinese medicine methods, it is generally treated by taking traditional Chinese medicine orally. Patients need to decoct traditional Chinese medicine decoctions and take them orally for a long time, which is difficult for patients to adhere to, thus affecting the treatment effect.

[0003] Therefore, how to prepare a traditional Chinese medicine for treating skin itching, which is convenient to use and conducive to patients' adherence, and can also ensure the treatment effect, has become a new research topic. Summary of the Invention

[0004] The purpose of the present invention is to effectively treat patients' skin itching.

[0005] To achieve the above purpose, the present invention provides a foot bath potion for treating skin itching. The active ingredients of the foot bath potion are composed of gypsum fibrosum, ephedra, atractylodes rhizome, jujube, licorice root, cortex dictamni, poria peel, and wax gourd peel.

[0006] Preferably, the weight ratios of each active ingredient are as follows: 5 - 10 parts by weight of gypsum fibrosum, 0.5 - 3 parts by weight of ephedra, 1 - 3 parts by weight of atractylodes rhizome, 1 - 3 parts by weight of jujube, 1 - 3 parts by weight of licorice root, 3 - 6 parts by weight of cortex dictamni, 3 - 6 parts by weight of poria peel, and 3 - 6 parts by weight of wax gourd peel.

[0007] Further preferably, the active ingredient and its weight ratio are respectively: 5 parts by weight of gypsum fibrosum, 0.9 parts by weight of ephedra, 1 part by weight of atractylodes rhizome, 1 part by weight of jujube, 1 part by weight of licorice root, 3 parts by weight of cortex dictamni, 3 parts by weight of poria peel, and 3 parts by weight of wax gourd peel.

[0008] Preferably, the foot bath potion is used for treating skin itching caused by hemodialysis.

[0009] To achieve the above purpose, the present invention further provides a preparation method of a foot bath potion for treating skin itching, including: Weigh each active ingredient according to the weight ratio, add water and decoct to concentrate into a medicinal liquid.

[0010] Preferably, the preparation method specifically includes the following steps: Step S1, weigh the active ingredients according to the weight ratio, and the total weight of the active ingredients is 170 - 200 g; Step S2: Add 900 - 1000 ml of water to the active ingredient, soak it, then boil it with strong fire and simmer it for 90 - 100 minutes, and filter to obtain the first residue and 250 - 350 ml of the first filtrate; Step S3: Add 300 - 400 ml of water to the first residue, boil it with strong fire and simmer it for 30 - 40 minutes, and filter to obtain 200 - 250 ml of the second filtrate; Step S4: After mixing the first filtrate and the second filtrate, obtain the foot bath potion.

[0011] Further preferably, in step S1, it further includes: after weighing the active ingredient, removing impurities from the active ingredient.

[0012] Further preferably, in step S2, the active ingredient is soaked in water for 5 - 6 hours.

[0013] Further preferably, in step S2, add 1000 ml of water to the active ingredient, and the obtained first filtrate is 300 ml.

[0014] Further preferably, in step S3, add 400 ml of water to the first residue, and the obtained second filtrate is 200 ml.

[0015] Compared with the prior art, for the foot bath potion for treating skin itching and its preparation method provided by the present invention, the active ingredient of the foot bath potion is composed of gypsum fibrosum, ephedra, atractylodes lancea, jujube, glycyrrhiza uralensis, dictamnus dasycarpus, poria peel, and wax gourd peel. By means of this active ingredient, the skin itching of patients can be effectively treated. The foot bath potion is more convenient to use, which is conducive to patients' long-term adherence, thus achieving a better antipruritic effect. Specific Embodiments

[0016] The following further elaborates on the present invention with specific embodiments. It should be understood that these embodiments are used to illustrate the basic principles, main features, and advantages of the present invention, and the present invention is not limited by the following embodiments. The implementation conditions adopted in the embodiments can be further adjusted according to specific requirements, and the implementation conditions not specified are usually those in conventional experiments. The term "including" mentioned throughout the specification and claims is an open-ended term, so it should be interpreted as "including but not limited to".

[0017] In the embodiments of the present invention, each active ingredient is mixed in a corresponding weight ratio to decoct the medicine. The main purpose of each active ingredient and its corresponding weight ratio is to reflect: drug efficacy and material cost. Only through a large number of experiments can it be known which active ingredient and its weight proportion have ideal drug efficacy and relatively low cost.

[0018] The active ingredients of the foot bath liquid for treating skin itching provided by the present invention are composed of gypsum fibrosum, ephedra, atractylodes lancea, jujube, glycyrrhiza uralensis, dictamnus dasycarpus, poria peel, and wax gourd peel. This foot bath liquid has the effects of clearing heat and removing dampness, dispelling wind and relieving itching, and can effectively relieve the symptoms of skin itching. Preferably, this foot bath liquid is used to treat skin itching caused by hemodialysis. Among them, the usage method of this foot bath liquid is as follows: Take 500 ml of this foot bath liquid, pour it into a foot bath basin, and then add about 500 ml of warm water. The temperature of the mixture is preferably between 35 and 40 °C. Soak the feet in the foot bath basin for 10 to 15 minutes and then dry them. That is to say, this foot bath liquid does not need to be taken orally, and it is easier to store than oral medications. Its usage method is simple and convenient, which is conducive to patients' long-term adherence, so as to achieve a better itching relief effect. It should be noted that any of the above-mentioned medicinal materials in the active ingredients are common medicinal materials that can be purchased on the market, and these medicinal materials have been included in the medical insurance. Using these medicinal materials can also reduce the medication cost of patients.

[0019] The pharmacology and functions of each active ingredient will be described in detail below respectively.

[0020] Gypsum fibrosum: It is extremely cold in nature, sweet and pungent in taste. It belongs to the lung and stomach meridians, and can clear heat and purge fire, remove vexation and relieve thirst. Clinically, it can be used to treat exogenous febrile diseases, high fever and vexation thirst, excessive stomach fire, headache and toothache, internal heat and polydipsia, etc.

[0021] Ephedra: It is warm in nature, pungent and slightly bitter in taste. It belongs to the lung and bladder meridians. It can induce sweating and disperse cold, ventilate the lung and relieve asthma, promote diuresis and alleviate edema. Clinically, it can be used to treat wind-cold cold, chest tightness and asthma, wind-water edema, wind-cold-damp arthralgia, yin carbuncle and phlegm nodes, etc.

[0022] Atractylodes lancea: It is warm in nature, pungent and bitter in taste. It belongs to the spleen, stomach and liver meridians. It can dry dampness and strengthen the spleen, dispel wind and cold, improve eyesight. Clinically, it can be used to treat dampness obstructing the middle-jiao, abdominal distension and fullness, diarrhea, edema, wind-damp arthralgia, beriberi flaccidity, wind-cold cold, night blindness, dim eyesight, etc.

[0023] Jujube: It is warm in nature, sweet in taste. It belongs to the spleen, stomach and heart meridians. It can invigorate the middle energizer and replenish qi, nourish blood and soothe the nerves. Clinically, it can be used to treat spleen deficiency with less food intake, fatigue and loose stools, hysteria of women, insomnia, etc.

[0024] Glycyrrhiza uralensis: It is neutral in nature, sweet in taste. It belongs to the heart, lung, spleen and stomach meridians. It can invigorate the spleen and replenish qi, clear heat and detoxify, resolve phlegm and relieve cough, relieve spasm and pain, and harmonize various medicinal herbs. Clinically, it can be used to treat spleen and stomach weakness, lassitude and weakness, insufficient heart qi, palpitation and shortness of breath, intermittent pulse, carbuncle and sore toxin, sore throat, etc.

[0025] Dictamnus dasycarpus: It is cold in nature, bitter in taste. It belongs to the spleen, stomach and bladder meridians. It can clear heat and dry dampness, dispel wind and detoxify. Clinically, it can be used to treat damp-heat sores and toxins, yellowish and dripping discharge, eczema, rubella, scabies and sores, damp-heat jaundice with red urine, wind-damp-heat arthralgia, etc.

[0026] Poria peel: It is neutral in nature, sweet and light in taste. It belongs to the lung, spleen, and kidney meridians. It can promote diuresis and reduce edema. Clinically, it can be used to treat edema, dysuria, etc.

[0027] Wax gourd peel: It is cool in nature and sweet in taste. It belongs to the spleen and small intestine meridians. It can promote diuresis and reduce swelling. Clinically, it can be used to treat abdominal distension due to edema, dysuria, thirst in summer heat, short and red urine, etc.

[0028] Among them, the weight ratios of the respective active ingredients in the foot bath lotion for treating skin itching are as follows: raw gypsum 5 - 10 parts by weight, raw ephedra 0.5 - 3 parts by weight, atractylodes rhizome 1 - 3 parts by weight, Chinese date 1 - 3 parts by weight, raw licorice root 1 - 3 parts by weight, dictamnus cortex 3 - 6 parts by weight, poria peel 3 - 6 parts by weight, wax gourd peel 3 - 6 parts by weight. It should be noted that the parts by weight represent the weight ratios of the respective active ingredients to the total weight of the active ingredients. That is to say, 1 part by weight can be, for example, 1g, 10g, 20g, etc. Any weight, and the specific value of 1 part by weight depends on the total amount of the foot bath lotion to be prepared. The present invention is not limited thereto.

[0029] Based on the above, the preparation method of the foot bath lotion for treating skin itching is to weigh according to the weight ratios of the respective active ingredients and concentrate them into a medicinal liquid by decocting with water.

[0030] In a preferred embodiment, the preparation method includes the following steps: Step S1, weighing: Weigh raw gypsum, raw ephedra, atractylodes rhizome, Chinese date, raw licorice root, dictamnus cortex, poria peel, and wax gourd peel respectively according to the weight ratios. The total weight of these active ingredients is 170 - 200g; Step S2, preparing the first filtrate: Add 900 - 1000 ml of water to the active ingredients weighed in step S1, soak them, boil them with strong fire, and then simmer them for 90 - 100 minutes. After filtration, obtain the first residue and 250 - 350 ml of the first filtrate; Step S3, preparing the second filtrate: Add 300 - 400 ml of water to the first residue, boil it with strong fire, and then simmer it for 30 - 40 minutes. After filtration, obtain 200 - 250 ml of the second filtrate; Step S4, obtaining the foot bath lotion: Mix the first filtrate obtained in step S2 with the second filtrate obtained in step S3 to obtain the foot bath lotion for treating skin itching.

[0031] Among them, the so-called strong fire refers to a relatively large and intense fire, and the so-called slow fire refers to a relatively small and stable fire, which is well-known to those skilled in the art and will not be elaborated here.

[0032] Preferably, the step S1 further includes: after weighing all the active ingredients, impurity removal is performed on the active ingredients. Among them, the impurity removal, for example, is to select the drugs and remove the moldy or deteriorated drugs; to remove impurities by washing with water, etc.; the present invention is not limited thereto.

[0033] Preferably, the total weight of the active ingredients weighed in the step S1 is 179 g.

[0034] Preferably, in the step S2, the active ingredients are soaked in water for 5 to 6 hours to ensure that the ingredients in the drugs can be fully dissolved into the medicinal liquid during the decocting process.

[0035] Preferably, in the step S2, 1000 ml of water is added to the active ingredients, and the obtained first filtrate is 300 ml.

[0036] Preferably, in the step S3, 400 ml of water is added to the filter residue; and the obtained second filtrate is 200 ml.

[0037] It should be noted that for the preparation method of the foot bath potion described in this article, the weight of the active ingredients, the amount of water added, the decocting duration, etc. are all values given based on the amount of medicine required for each use. That is to say, when actually preparing the foot bath potion, these values can be adjusted as appropriate according to the actual condition of the patient, and the proportional changes of these values should all be understood as this preparation method.

[0038] Preferably, in the step S4, the foot bath potion can also be packaged into sterile glass bottles for standby. Among them, the dosage of the foot bath potion each time is 500 ml, the capacity of each glass bottle can correspond to the dosage of the foot bath potion each time, or the glass bottle can be filled with the amount for multiple uses and there are scales printed on the side wall of the glass bottle to help the patient control the dosage of the foot bath potion each time. Further, it is preferably foot bathed once a day until the clinical symptoms and signs completely disappear. A treatment cycle is generally about two weeks, and the curative effect can be consolidated for 3 to 5 days, but the actual application is not limited thereto.

[0039] Among them, since the foot bath potion for treating skin itching does not need to be taken orally, it is easier to store than the oral dosage form. The patient can prepare or purchase the dosage required for the entire treatment cycle at one time, and the use method of foot bathing is relatively convenient, which is conducive to the patient's continuous use to obtain better curative effects. With the foot bath potion for treating skin itching, 100 cases were treated within 3 years, and the effective rate was 100%. Among these 100 medical records, 90 cases took effect within 2 weeks of use, 4 cases took effect within 3 weeks of use; and 30 cases were cured within 2 months.

[0040] It should be noted that after taking drugs in oral dosage form, the patient's liver is required to decompose and absorb them, which will inevitably impose a burden on the patient's body. However, the foot bath lotion provided in the embodiments of the present invention does not need to be taken orally. On the basis of ensuring the efficacy of the drug, it can also avoid imposing an unnecessary burden on the patient's liver.

[0041] The following combines several relatively typical clinical experimental data to illustrate the effect of the foot bath lotion for treating skin itching: Example

[0042] Liu, male, 87 years old, from Jiangning District, Nanjing City, Jiangsu Province.

[0043] He visited the doctor in January 2025. At the time of the visit, due to more than 4 years of hemodialysis and 1 year of skin itching, he was diagnosed with pruritus. Foot bath was carried out with foot bath lotion A prepared by the above-mentioned active ingredients and preparation method, 500 ml each time, once a day. After 1 week, the skin itching was relieved. After another 2 weeks, the itching disappeared.

[0044] In this example, the specific weight ratio of the active ingredients in the foot bath lotion A is: 5 parts of gypsum fibrosum, 0.9 part of ephedra vulgaris, 1 part of atractylodes lancea, 1 part of jujube, 1 part of glycyrrhiza uralensis, 3 parts of cortex dictamni, 3 parts of cortex poriae cocos, and 3 parts of cortex benincasae hispidae. Example

[0045] Zhang, male, 59 years old, from Yuhuatai District, Nanjing City, Jiangsu Province.

[0046] He visited the doctor in February 2025. At the time of the visit, due to more than 2 years of hemodialysis and 1 year of skin itching, he was diagnosed with pruritus. Foot bath was carried out with foot bath lotion B prepared by the above-mentioned active ingredients and preparation method, 500 ml each time, once a day. After 2 weeks, the skin itching was relieved. After another 3 weeks, the itching disappeared.

[0047] In this example, the specific weight ratio of the active ingredients in the foot bath lotion B is: 5 parts of gypsum fibrosum, 0.9 part of ephedra vulgaris, 1 part of atractylodes lancea, 1 part of jujube, 1 part of glycyrrhiza uralensis, 6 parts of cortex dictamni, 3 parts of cortex poriae cocos, and 3 parts of cortex benincasae hispidae. Example

[0048] Wu, male, 59 years old, from Jianye District, Nanjing City, Jiangsu Province.

[0049] He visited the doctor in February 2025. At the time of the visit, due to more than 6 years of hemodialysis and 2 years of skin itching, he was diagnosed with pruritus. Foot bath was carried out with foot bath lotion C prepared by the above-mentioned active ingredients and preparation method, 500 ml each time, once a day. After 2 weeks, the skin itching was relieved. After another 3 weeks, the itching disappeared.

[0050] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine C is specifically: 5 parts of raw gypsum, 0.9 parts of raw ephedra, 2 parts of atractylodes, 1 part of jujube, 1 part of raw licorice, 3 parts of Dictamni peel, 3 parts of Poria peel, and 3 parts of wax gourd peel. Example

[0051] Wang, male, 59 years old, from Jiangning District, Nanjing City, Jiangsu Province.

[0052] In December 2024, the patient was diagnosed with pruritus due to hemodialysis for more than 6 years and skin itching for 1 year. Foot bath was performed with foot bath solution D prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 2 weeks of use, the itching improved.

[0053] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine D is specifically: 10 parts of raw gypsum, 1 part of raw ephedra, 1 part of atractylodes, 1 part of jujube, 1 part of raw licorice, 6 parts of Dictamni peel, 6 parts of Poria peel, and 6 parts of wax gourd peel. Example

[0054] Ao, female, 60 years old, from Yuhuatai District, Nanjing City, Jiangsu Province.

[0055] In October 2024, the patient was diagnosed with pruritus due to hemodialysis for more than 6 years and skin itching for 1 year. Foot bath was performed with foot bath solution E prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 3 weeks of use, the itching improved.

[0056] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine E is specifically: 5 parts of raw gypsum, 2 parts of raw ephedra, 1 part of atractylodes, 1 part of jujube, 1 part of raw licorice, 5 parts of Dictamni peel, 3 parts of Poria peel, and 3 parts of wax gourd peel. Example

[0057] Yang, female, 67 years old, from Jianye District, Nanjing City, Jiangsu Province.

[0058] In November 2024, the patient was diagnosed with pruritus due to hemodialysis for more than 4 years and skin itching for 1 year. Foot bath was performed with foot bath solution F prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 4 weeks of use, the itching improved.

[0059] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine F is specifically: 5 parts of raw gypsum, 1 part of raw ephedra, 1 part of atractylodes, 1 part of jujube, 2 parts of raw licorice, 4 parts of Dictamni peel, 5 parts of Poria peel, and 3 parts of wax gourd peel.

[0060] Li, female, 58 years old, from Jianye District, Nanjing City, Jiangsu Province.

[0061] In November 2024, the patient was diagnosed with pruritus due to hemodialysis for more than 3 years and skin itching for 1 year. Foot bath was performed with foot bath solution G prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 2 weeks, the itching still did not improve.

[0062] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine G is specifically: 15 parts of raw gypsum, 2 parts of raw ephedra, 1 part of atractylodes, 1 part of jujube, 1 part of raw licorice, 3 parts of Dictamni peel, 3 parts of Poria peel, and 3 parts of wax gourd peel.

[0063] Han, female, 45 years old, from Jiangning District, Nanjing.

[0064] In January 2025, the patient was diagnosed with pruritus due to hemodialysis for more than 2 years and skin itching for half a year. Foot bath was performed with foot bath solution H prepared by the above-mentioned active ingredients and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 2 weeks, the itching still did not improve.

[0065] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine H is specifically: 5 parts of raw gypsum, 0.9 parts of raw ephedra, 6 parts of atractylodes, 1 part of jujube, 1 part of raw licorice, 3 parts of Dictamni peel, 3 parts of Poria peel, and 3 parts of wax gourd peel.

[0066] Cen, female, 48 years old, from Jianye District, Nanjing City, Jiangsu Province.

[0067] In December 2024, the patient was diagnosed with pruritus due to hemodialysis for more than 4 years and skin itching for 2 years. Foot bath was performed using foot bath solution I prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not alleviate. After another 2 weeks, the itching did not improve.

[0068] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine I is specifically: 20 parts of raw gypsum, 5 parts of raw ephedra, 1 part of atractylodes, 1 part of jujube, 1 part of raw licorice, 3 parts of Dictamni peel, 3 parts of Poria peel, and 3 parts of wax gourd peel.

[0069] Ai, female, 55 years old, from Jianye District, Nanjing.

[0070] In March 2025, the patient was diagnosed with pruritus due to hemodialysis for more than 4 years and skin itching for 2 years. Foot bath was performed with foot bath solution J prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 2 weeks, the itching still did not improve.

[0071] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine J is specifically: 2 parts of raw gypsum, 1 part of raw ephedra, 1 part of atractylodes, 1 part of jujube, 5 parts of raw licorice, 3 parts of Dictamni peel, 10 parts of Poria peel, and 3 parts of wax gourd peel.

[0072] Zhao, male, 55 years old, from Yuhuatai District, Nanjing.

[0073] In December 2024, the patient was diagnosed with pruritus due to hemodialysis for more than 5 years and skin itching for 3 years. Foot bath was performed with foot bath solution J prepared by the above-mentioned active ingredient and preparation method, 500 ml each time, once a day. After 1 week, the skin itching did not improve. After another 2 weeks, the itching still did not improve.

[0074] In this embodiment, the weight ratio of the effective ingredients in the foot bath medicine J is specifically: 2 parts of raw gypsum, 5 parts of raw ephedra, 5 parts of atractylodes, 1 part of jujube, 5 parts of raw licorice, 3 parts of Dictamni peel, 3 parts of Poria peel, and 3 parts of wax gourd peel. It can be seen from the above embodiments and comparative examples that the present invention adopts the above active ingredients and mixes them in a suitable weight ratio to prepare the foot bath medicine A~F for treating skin itching, so that each active ingredient can produce a synergistic effect, thereby enabling the foot bath medicine to effectively treat the patient's skin itching. Among them, from the length of time it takes for the patient to recover after treatment with foot bath medicines of different proportions, it can be seen that foot bath medicine A has the best efficacy.

[0075] In summary, the foot bath medicine for treating skin itching provided by the present invention and its preparation method, the effective ingredients of the foot bath medicine are composed of raw gypsum, raw ephedra, atractylodes, jujube, raw liquorice, white fresh peel, Poria peel and wax gourd peel. The effective ingredients and weight proportions are respectively: 5-10 weight parts of raw gypsum, 0.5-3 weight parts of raw ephedra, 1-3 weight parts of atractylodes, 1-3 weight parts of jujube, 1-3 weight parts of raw liquorice, 3-6 weight parts of white fresh peel, 3-6 weight parts of Poria peel, and 3-6 weight parts of wax gourd peel. By means of the effective ingredient, the skin itching of the patient can be effectively treated. The foot bath medicine is more convenient to use, which is beneficial for the patient to adhere to for a long time, so as to achieve a better antipruritic effect.

[0076] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A foot bath lotion for treating skin itching, characterized in that, The active ingredients of this foot bath liquid medicine are composed of gypsum fibrosum, ephedra, atractylodes lancea, jujube, licorice root, cortex dictamni, poria peel, and wax gourd peel.

2. The foot bath liquid for treating skin itching according to claim 1, wherein, The weight ratios of each active ingredient are as follows: 5 - 10 parts by weight of gypsum fibrosum, 0.5 - 3 parts by weight of ephedra, 1 - 3 parts by weight of atractylodes lancea, 1 - 3 parts by weight of jujube, 1 - 3 parts by weight of licorice root, 3 - 6 parts by weight of cortex dictamni, 3 - 6 parts by weight of poria peel, and 3 - 6 parts by weight of wax gourd peel.

3. The foot bath potion for treating skin itching according to claim 2, wherein The active ingredients and their weight ratios are respectively: 5 parts by weight of gypsum fibrosum, 0.9 parts by weight of ephedra, 1 part by weight of atractylodes lancea, 1 part by weight of jujube, 1 part by weight of licorice root, 3 parts by weight of cortex dictamni, 3 parts by weight of poria peel, and 3 parts by weight of wax gourd peel.

4. The foot bath liquid for treating skin itching according to claim 1, wherein, This foot bath liquid medicine is used to treat skin pruritus caused by hemodialysis.

5. The preparation method of the foot bath liquid for treating skin itching according to any one of claims 1 to 4, characterized in that, It includes: Weigh each active ingredient according to the weight ratio, and add water to decoct and concentrate it into a liquid medicine.

6. The preparation method of the foot bath liquid for treating skin itching as described in claim 5, characterized in that, This preparation method specifically includes the following steps: Step S1: Weigh the active ingredients according to the weight ratio, and the total weight of the active ingredients is 170 - 200 g; Step S2: Add 900 - 1000 ml of water to the active ingredients, soak them and then boil them with strong fire, and then simmer for 90 - 100 minutes, filter to obtain the first residue and 250 - 350 ml of the first filtrate; Step S3: Add 300 - 400 ml of water to the first residue, boil it with strong fire, and then simmer for 30 - 40 minutes, filter to obtain 200 - 250 ml of the second filtrate; Step S4: After mixing the first filtrate and the second filtrate, obtain this foot bath liquid medicine.

7. The preparation method of the foot bath liquid for treating skin pruritus according to claim 6, wherein, In step S1, it also includes: after weighing the active ingredients, removing impurities from the active ingredients.

8. The preparation method of the foot bath liquid for treating skin itching according to claim 6, wherein, In step S2, the active ingredients are soaked in water for 5 - 6 hours.

9. The preparation method of the foot bath liquid for treating skin itching according to claim 6, characterized in that, In step S2, add 1000 ml of water to the active ingredients, and the obtained first filtrate is 300 ml.

10. The preparation method of the foot bath liquid for treating skin itching according to claim 6, characterized in that, In step S3, add 400 ml of water to the first residue, and the obtained second filtrate is 200 ml.