Psoriasis, scientifically known as psoriasis, is a common, multiple, chronic, recurrent inflammatory skin disease. Its incidence has been increasing significantly in recent years. There are approximately 30 million patients in China. Because the cause and pathogenesis of the disease are not yet fully understood and there is no complete cure, it is listed as an important research topic in the field of dermatology in the world today. The causes of psoriasis are complex and are related to genetic factors, as well as interacting with environmental factors, and are also affected by emotional changes. Clinical manifestations are divided into four types, 98% of which are common psoriasis and the remaining three types are erythrodermic, pustular and arthritic. The clinical manifestations are heavier and can be accompanied by systemic symptoms, such as fever, arthralgia and hypoproteinemia. If not treated properly, common psoriasis can be transformed into erythrodermic and pustular psoriasis, which can have serious health effects. Psoriasis is easy to diagnose, but difficult to treat, and to date, there is no cure for it internationally. Therefore, patients should not believe in the advertisement that “the medicine will cure the disease”. In order to pursue the so-called cure, patients go through a lot of hardships and eat many Chinese medicines containing hormones, immunosuppressants or toxic ingredients (mercury, arsenic, lead). In light cases, chronic poisoning, impaired liver and kidney function, and disability; in serious cases, death. We have encountered many such cases in our clinical work. It is very sad to see. This is why it is said that “you should not seek medical help when you are sick”. This is a sign of irresponsibility to oneself. If you have psoriasis, it is better not to treat it than to treat it indiscriminately. The treatment of psoriasis should be tailored to the patient’s gender, age, location, and stage of illness, which means that the treatment should be highly individualized and tailored to the patient’s needs. This is perhaps the fundamental method of treating psoriasis, which is the combination of disease identification in Western medicine and evidence identification in Chinese medicine, and the accurate “body measurement”. Based on years of experience and clinical research, the author has come up with a set of effective methods for treating psoriasis, namely the three-step Chinese medicine method for treating common psoriasis, which is easy to implement, safe and reliable. This method treats psoriasis from the blood theory. In the first step, the initial stage of the disease is mostly blood heat and toxicity. Therefore, the main purpose is to clear the heat and detoxify the blood and cool the blood, and the formula is based on, Shuang Hua, Lian Qiao, Zhi Mu, Yuan Shen, Dan Pi, raw Sophora, Scutellaria, Job’s Tear, and Dan Pi. In the second step, when the disease is stable and quiet, the main purpose is to nourish Yin and invigorate Blood. The formula is based on Yuan Shen, Mai Dong, Radix Angelicae Sinensis, Atractylodes Macrocephala, Zhi Mu, Tao Ren, Safflower, Chuan Xiong, Chicken Blood Vine, Shou Wu Vine, etc. In the third step, in the late stage of the disease, the evil and the positive are fighting against each other, the qi and blood are depleted and the vital energy is lost. Through the above three steps, the disease can be gradually recovered, and the treatment effect can be consolidated by careful adjustment. The patient should avoid the stimulation of unfavorable factors in addition to adhering to the correct treatment, which is also important for the prevention of relapse and recovery. 2, avoid appropriate mouth, do not eat spicy, fish and shrimp and other allergic meat and fishy food. Quit smoking and alcohol. 3, avoid bathing water temperature is too high or too low. Generally 30-37 degrees is appropriate. 4, keep a happy spirit, emotional stability, from stimulation, avoid overexertion. 5, the treatment of moderate choice of drugs, avoid the abuse of cytotoxic and hormonal drugs. 6.After the acute progression period, avoid external drugs with strong irritation. Get rid of the misconceptions in psoriasis treatment Misconception one: superstitious advertisement Misconception two: pursuit of radical treatment Misconception three: excessive avoidance of food Misconception four: a worry