The invention relates to pure traditional Chinese medicinal lotion for treating skin diseases, which is prepared from weeping forsythiae, cicada shell, angelica dahurica, common cnidium fruit, belvedere fruit, dandelion, wild chrysanthemum, caulis lonicerae, glabrous greenbrier rhizome, light yellow sophora root, cortex dictamni, Chinese mugwort leaf, amur corktree bark, virgate wormwood herb, red paeony root, salvia miltiorrhiza bunge, borneol and other traditional Chinese medicines. The lotion has the effects of clearing heat, detoxicating, clearing damp, dispeling the wind, relieving itching, cooling blood, invigorating the circulation of blood, diminishing swelling and relieving pain. The lotion is suitable for treating various skin dieases caused by skin invasion of exogenous pathogenic factors including 'wind, damp, heat, toxic and worm', and is particularly applicable to infants with various skin diseases such as eczema, heat rash, diaper rash, milk ringworm, urticaria, cutaneous pruritus, erythema, red spot, dermatitis, papule, herpes, ulcer, furuncle and carbuncle, pruritusani, unknown pyogenic infection, bite by mosquito and worms, jaundice and congenital disease. The lotion is applicable to adults. For example, the lotion can be used for treating female vaginal discharge disease, pruritus genitalium, pruritus ani and other diseases.