In Chinese medicine, “taboo” is relative to the cold and hot deficiency of the disease, such as cold evidence should be avoided raw, cold, hard food, hot evidence, then avoid dry, hot, warm food. Western medicine also has “taboo”, such as diabetic patients avoid sugar food, hypertensive patients avoid eating salt food. Thus, it seems that both Chinese and Western medicine determine the “taboo” food by the mechanism of disease and symptoms, which is also called “hair products”. So what are the “hair products” of psoriasis? Chinese medicine can find that psoriasis is mostly characterized by heat. If a hot person consumes warm mutton, shrimp, yellow beef, etc., it will make the hot evidence even worse, and the rash will become more red and itchy and expand. These foods can be referred to as “hair products” for people with hot evidence. Therefore, psoriasis patients should avoid eating red meat (such as cattle, sheep, deer, dog meat), so as not to increase the production of inflammation-causing substances and increase the recurrence or aggravation of psoriasis skin lesions. We have encountered many clinical cases where the skin lesions relapsed or worsened due to the consumption of mutton. From the perspective of Chinese medicine and in connection with laboratory results, it can be considered that mutton is a “hair product” for these patients.