Patients with atopic dermatitis can eat celery if they have not been allergic to it in the past. If the allergic dermatitis is caused by ultraviolet light allergy, it is necessary to eat a small amount of food, because celery, parsley, mushrooms and other foods can lead to an increase in photosensitivity, which can lead to the aggravation of dermatitis caused by ultraviolet light allergy, so it is necessary to pay attention to a small amount of food, and to pay attention to sunscreen after eating. Allergic dermatitis is best to conduct allergen testing, patch test, etc., to clarify the cause of allergy so as to avoid, at the same time need to pay attention to the appearance of the rash during the avoidance of spicy, stimulating food, lesions, pay attention to do not scratch, such as ulceration do not contact with water, the treatment is mainly anti-allergy treatment.