Psoriasis is a common chronic skin disease characterized by the repeated appearance of multiple layers of silvery-white dry scales on erythematous patches. It is called “white H” in ancient Chinese medicine and also called pineal psoriasis in ancient medical texts. Psoriasis, commonly known as psoriasis in Western medicine, is characterized by the appearance of papules of varying sizes, erythematous plaques covered with silvery-white scales, with clear borders, and is most common on the scalp, extremities and back. It is more common in men than in women. The rash tends to recur or worsen in spring and winter, while it mostly remits in summer and autumn. In addition, wild advertisements in cities are also called “psoriasis”. It is not scientific to use the term psoriasis to summarize the name of the disease, because psoriasis is not actually ringworm. The so-called ringworm medically refers to a number of skin diseases caused by fungal infections, such as ringworm of the head, ringworm of the femur, ringworm of the body, ringworm of the hands and feet, ringworm of the fingernails, and so on. The local dander of these ringworm can often be found under a microscope as fungal hyphae or fungal spores, and treatment with antifungal medications can often be very effective. Psoriasis, on the other hand, is not caused by a fungal infection and is medically referred to as psoriasis. It has a complex pathogenesis and treatment with antifungal drugs is often ineffective. Therefore, don’t look to take antifungal medications on your own or use ringworm topicals indiscriminately to avoid wasting money and aggravating your condition. Since psoriasis lesions are covered with silvery-white scales, which are very characteristic, it is very appropriate for western medicine to call it psoriasis. The use of the word psoriasis should also be advocated in a respectful attitude toward patients. According to the survey, the incidence of psoriasis accounts for 0,1% to 3% of the world’s population, and the incidence of yellow is 0,1% to 0,3%. The incidence of the disease in the population is significantly higher in Caucasians than in yellow, and the second highest in black. As of 2007, the number of patients with psoriasis in China has reached more than 4.3 million. According to a survey conducted in the United States in recent years, its incidence rate is 2.6%, with as many as 6-7 million patients, far higher than that of China. Because the disease is stubborn and difficult to treat, it is still listed as an important research topic in the field of dermatology in the world today and is one of the key prevention and treatment diseases in dermatology worldwide. At the National Collaborative Conference on Psoriasis Prevention and Treatment held in recent years, the participating experts agreed that “the combination of traditional Chinese medicine and western medicine is the direction to prevent and treat psoriasis. Western medicine anti-cancer drugs and hormone drugs have serious side effects and should be avoided as much as possible. For psoriasis, we must understand the following points: 1. There is no special prevention method and definite treatment method for this disease. 2, the disease is not contagious, even for patients with severe disease. 3, treatment at the same time must relieve the patient’s mind concerns, avoid possible triggers, avoid stimulating food, avoid stimulating therapy, prohibit scratching and hot water washing. 4.Appropriate treatment of psoriasis can lead to recent clinical cure, but most patients may relapse. 5.Usually there is no visceral damage and the prognosis is good. 6, because of the need to fast certain foods, patients need to adjust to increase other foods to prevent malnutrition. 7.Psoriasis lesions are a chronic inflammatory skin disease although they are red in color, have thickened skin, and have a long course. However, this inflammation of psoriasis is not directly caused by infectious pathogenic factors, such as bacteria, fungi or parasites. Modern medical tests have reached a fairly high level, but so far have not been able to prove that psoriasis has an infectious causative agent. The clinical practice observes that psoriasis is also not contagious, and all indications are that it is not.