There are no fruits that can’t be eaten in lichen planus, but those who involve the oral mucosa should try not to eat fruits that are too acidic, cold or hard. Lichen planus is a kind of idiopathic inflammatory skin disease that can involve the skin, mucous membranes, external genitalia, finger (toe) nails and other parts of the body. The cause of the disease is not known, or with immune abnormalities, genes, infections, chronic diseases, metabolic disorders, mental nerves and other factors, because of the fruit has no relationship with the fruit, and the fruit has no disease-causing effect, so there is no such thing as the fruit that can’t be eaten. If lichen planus involves the oral mucosa, it may often appear erosion or ulcers, triggering pain, then try not to eat too acidic or cold hard fruit, so as not to stimulate the oral mucosa aggravate the pain. If the lichen planus is left untreated, complications such as cancer, hypogonadism and eating disorders may occur as the condition worsens. In order to relieve the pain and prevent complications, patients should actively cooperate with doctors for treatment.