Skin diseases caused by damp heat include eczema, aspergillosis, pemphigus vulgaris, herpes zoster, lupus erythematosus, erythema multiforme, dermatomyositis, and scleroderma. In Chinese medicine, skin diseases caused by damp heat can be treated together with other diseases. Patients often have a reddish rash and may have accompanying symptoms, such as dry mouth, thirst, short red urine, sticky stools, red tongue, yellow greasy coating, and slippery pulse. Commonly used therapeutic drugs are as follows: 1. gentian diarrhea of the liver soup plus reduction, the composition of the formula includes gentian herb, scutellaria, Zhi Mu, gypsum, mu Tong, etc.; 2. topical drugs, such as decoction of fresh amaranth, cypress and scutellaria with cold wet compress 2 times/day for 20 minutes/time.