Perioral dermatitis is an inflammatory disease that occurs around the mouth, mainly manifested as red spots, pimples and peeling of the skin around the mouth, and the recurrence of the disease is mostly related to external stimuli. If the perioral dermatitis is cured and comes into contact with allergy-prone objects or environment again, it is easy to recur, such as consuming spicy and stimulating foods, using skin care products, and prolonged exposure to sunlight. Moreover, most of the perioral dermatitis will have red spots, redness, swelling and even peeling of the skin around the mouth, so you have to pay extra attention to clean and care. After curing perioral dermatitis, you should avoid contact with allergy-prone foods, avoid prolonged exposure to sunlight, and do not use cosmetics that contain irritating ingredients. If it recurs again, you can take oral loratadine tablets, cetirizine hydrochloride tablets and other anti-allergy drugs according to the doctor’s instructions, and if the itching is serious, you can apply tacrolimus ointment and other antipruritic ointment according to the doctor’s instructions. It is recommended to seek medical treatment after suffering from perioral dermatitis, the use of drugs must follow the doctor’s instructions, do not self-medication, so as not to cause serious consequences.