Psoriasis, also widely known as "psoriasis," is a common polygenic hered skin disease, often manifested as limited or widely distributed scaly erythema or plaques. The causes of psoriasis are still not fully understood, but it has identified as the result of the interaction of multiple factors, including genetic factors and environmental factors. This disease is related to factors such as meridian, dietary, climatic seasonal, and history. The prevalence of psoriasis varies greatly throughout the world, with a relatively low prevalence in China, especially in northern regions. However, due to the large population base the total number of patients is still large. Psoriasis has a variety of types, the most common being the common type, in addition to arthropathic type,ustular type, and erythrodermic type. The symptoms of psoriasis are diverse, mainly including the appearance of red patches on the skin, covered with silvery white scales, itching, burning or pain of the skin, dryness, cracking, and even bleeding of the skin. Some patients may also have joint pain swelling, and abnormalities of the fingernails (toenails). Psoriasis is not infectious, and the routes of transmission usually include family heredity or stimulation.

The primary goal of treating psoriasis is to control the condition and alleviate the symptoms of patients. Current methods include drug therapy, phototherapy, and traditional Chinese medicine therapy, etc. Although it is not possible to completely cure the disease at this stage, active treatment can significantly reduce skin lesions or promote recovery, avoid severe complications, and improve the quality of life of patients. The best way to prevent psoriasis is to control emotional stress, avoid bad living, regular physical examination, and timely medical treatment.   The latest research on psoriasis shows that the factors of the immune system play an important role in the occurrence development of psoriasis. Although the pathogenesis of this disease has not been fully clarified, it has been clarified that genetic factors are one of the main factors for the onset psoriasis. More importantly, many psoriasis susceptibility gene loci have been mastered at present, which provides new possibilities and directions for the treatment of psorias.