Erythema multiforme is an acute self-limiting inflammatory skin disease, often accompanied by mucosal damage, with a polymorphic rash and typical damage in the form of target-shaped or iridescent damage. It can be caused by a variety of reasons, can be associated with infection with bacteria, viruses (especially herpes simplex virus), enzyme bacteria, protozoa, can also be caused by certain drugs, such as sulfonamides, barbiturates, salicylates and biologics, and in some people with cold factors. The following is an introduction to erythema multiforme-like rash patients during the onset of which foods should be avoided. 1, meat chicken, duck, goose, dog, beef and mutton, pig head, pig’s feet, pig offal. 2, vegetables onions, ginger, garlic, garlic, leeks, chili peppers, onions, garlic, garlic, celery, parsley, fungus, mushrooms, fennel, fennel, artemisia, red, toon and so on. 3, hairy things fish, shrimp and seafood, sauerkraut, fermented bean curd, stinky tofu and so on. In short, erythema multiforme-like rash patients should actively look for the cause of the disease, lift the cause of the stimulus; avoid eating fish, shrimp, crab, garlic, leeks and other foods; at the same time to strengthen the body exercise, improve the body’s immunity.