The redness and peeling around the corners of the mouth may be caused by the climate being too dry, contact dermatitis, keratitis, etc. The skin around the corners of the mouth may be red and peeling around the corners of the mouth. 1. Climate is too dry: because the climate is too dry in the fall and winter seasons, the air humidity is low, which can easily lead to dry skin, especially if you do not pay attention to reasonable hydration, which can easily lead to peeling of the corners of the mouth, resulting in redness and peeling around the corners of the mouth. 2. Contact dermatitis: easy allergic patients, after the use of lipstick, cosmetics, will lead to local skin allergic reaction, so that patients appear around the corners of the mouth redness and peeling, accompanied by edematous erythema, itching and other symptoms. 3. Keratitis: related to vitamin deficiency, infection, etc., will lead to inflammation around the corners of the mouth, redness around the corners of the mouth, dry skin and other symptoms. Redness and skinning around the corners of the mouth, if it continues to fail to improve, you should seek medical attention as soon as possible, to clarify the cause of the disease, and then under the advice of the doctor for treatment.