The two sides of the mouth dry peeling red considering keratitis, contact lipitis, seborrheic dermatitis and other factors, need to go to the hospital in time to find out the cause of the disease. 1. Keratitis: a general term for various inflammations that occur in the upper and lower lip joint corners of the mouth, can occur unilaterally or bilaterally symmetrically, and candida and streptococcal infections, malnutrition, and contact with allergens and cause. It can lead to cracking, peeling, redness and swelling of the skin around the patient’s mouth. 2. contact labiitis: refers to the lips and the skin around the lips after contact with certain exogenous substances and caused by labiitis, is one of the more common lip diseases, can lead to the patient’s lip mucosa swelling, blisters and hypertrophy and other phenomena, with the blisters drying up, crusting, which can lead to localized drying and desquamation and other symptoms. 3. seborrheic dermatitis: also known as seborrheic eczema, belongs to the chronic superficial skin diseases, can lead to local skin erythema, scaling and itching and other uncomfortable symptoms, so when the skin on both sides of the mouth seborrheic dermatitis, can cause dry flaking and redness of the phenomenon. There are many reasons for the dryness and redness on both sides of the mouth, so it is recommended to go to the hospital in time to find out the cause of the disease and then carry out reasonable treatment.