Psoriasis, also known as “psoriasis”, does not have the name of psoriasis in Chinese medicine, but many Chinese medical literature discusses it similarly to modern psoriasis, such as “dry psoriasis” in the Sui Dynasty, “wind psoriasis” in the Ming Dynasty, and “pineal psoriasis” in the Qing Dynasty. “dry ringworm” in the Sui Dynasty, “wind ringworm” in the Ming Dynasty, “pine bark ringworm” in the Qing Dynasty, etc. The incidence of the disease is 0.1%-3% in the natural population, and the incidence varies greatly geographically, with a low incidence in near-tropical areas. The disease can occur at all ages, mainly in young adults, and is more prevalent in winter and spring. The cause of the disease is unknown, among many theories, genetic background is considered to be the decisive factor for disease susceptibility, infection, mental factors, endocrine factors, trauma, diet, metabolic disorders, immune factors and certain drugs can trigger and aggravate psoriasis, in addition to climate, light, humidity, environmental pollution can also trigger or aggravate psoriasis. Is psoriasis contagious? Many people have the misconception that psoriasis and other skin diseases are contagious, and many psoriasis patients have become inferior and reluctant to interact with others; the above understanding is wrong, psoriasis is not contagious and does not affect the health of patients, but remember that psoriasis is “better to be treated indiscriminately than not to be treated”, using various ” The use of various “prescriptions” and other irregular treatments will transform psoriasis into erythrodermic, arthritic and pustular psoriasis, which will seriously affect patients’ health and quality of life. The disease has a great relationship with mental factors, patients should not be overly anxious, establish self-confidence, regard psoriasis as “a lifelong friend”, “God’s tattoo”, and live in peace with it.