The invention provides an 
itching-relieving washing 
medicine bag and a preparation method thereof, wherein the washing 
medicine bag is prepared from the following main materials in parts by weight: 20-30 parts of cortex pseudolaricis, 20-30 parts of radix stemonae, 10-20 parts of dried 
alum, 8-15 parts of fructus kochiae, 8-15 parts of fructus cnidii, 8-15 parts of 
fructus xanthii, 10-15 parts of 
hydnocarpus anthelmintica, 5-10 parts of pepper seeds, 10-20 parts of radix sophorae flavescentis, 10-20 parts of 
bark of himalayan coralbean, 10-20 parts of 
senecio scandens, 8-15 parts of purslane, 10-20 parts of tooth 
soap, 8-15 parts of folium artemisiae argyi, 8-15 parts of 
lithospermum, 8-15 parts of 
liquidambar formosana hance, 10-20 parts of calamine and 8-15 parts of mint. The 
itching-relieving washing 
medicine bag disclosed by the invention has effects of clearing heat and expelling damp, inhibiting 
bacteria and killing insects, diminishing 
inflammation, moistening 
skin, 
softening skin and promoting 
blood circulation, is not only convenient, but also is safe and 
environmentally friendly, and almost suitable for all 
crowds. Moreover, the 
itching-relieving washing medicine bag has remarkable 
treatment effect on pruritus 
skin diseases such as 
chronic eczema, hand-foot 
tinea corporis, 
scabies, miliaria, 
neurodermatitis, 
prurigo nodularis, 
amyloidosis, 
pruritus vulvae, urticaria papulosa, and the like, and especially has effects of getting twofold results with half the effort for the itching of 
thick skin which cannot be permeated by external-use ointment.