Psoriasis, commonly known as “psoriasis”, is a chronic inflammatory skin disease characterized by scaly erythematous plaques, according to the latest scientific literature. Its etiology and pathogenesis are still not fully elucidated, but studies have suggested that it is related to genetic, infectious, immune, endocrine and metabolic factors, and certain physicochemical factors and drugs can also induce psoriasis. The disease is extremely variable in course and morphology and is prone to recurrence after cure, causing great physical and mental pain to patients. According to clinical manifestations, psoriasis is divided into four types: common, pustular, erythrodermic and arthrodermic, among which the common type is the most common. Chinese medicine believes that blood heat is the fundamental pathogenesis of psoriasis. Patients with psoriasis are mostly young people who have heat in their bodies, and they develop psoriasis due to external sensation of six kinds of molestation, or eating spicy alcoholic wine, fatty sweet and thick taste, or disturbance of the mind or internal injury of the seven emotions, etc., all of which cause blood heat to be contained within the body and turn into poison for a long time, resulting in the overflow of blood heat and poisonous evil to the skin. Do not believe in any advertisements, especially mail-order drugs, whose efficacy is short-lived and whose consequences may aggravate the disease in mild cases and endanger life in severe cases; 2. The disease can be triggered by dryness (dry skin, dry climate), so plainly use more moisturizers with skin barrier protection; 5, such as infectious lesions such as recurrent tonsillitis, tooth and gum or alveolar infection timely consultation with dermatologists; 6, pay attention to keep warm, regular life, avoid strain.