1, avoid fishy hair: such as shrimp, crab, hairtail, eel, dog meat, mutton, beef, cock, bamboo shoots, etc. Because these foods are damp and hot, pityriasis rosea is born. 2, do not eat alcohol, tobacco and pungent spices: such as pepper, pepper, garlic, onion, spiced powder, Chili sauce and so on. Because these foods are warm, pungent and dry, eating them in the body hurts yin and consumes blood, leading to blood dryness and aggravating pityriasis rosea. 3, do not eat greasy, fried foods: all kinds of fried foods such as fried dough sticks, fried chicken, roast duck, roast pig, fried peanuts, French fries, bacon and so on. Because of these food heat, endogenous damp heat consumes energy and hurts blood, causing internal heat due to yin deficiency and aggravating pityriasis rosea.