Redness around the chin may be caused by contact dermatitis, perioral dermatitis, folliculitis and other diseases. 1. Contact dermatitis: this disease is an inflammatory disease that occurs after local skin contact with allergens. If it occurs in the chin area, it can cause erythema, papules, flaking and so on, accompanied by itching. Patients are advised to stay away from allergens, use topical glucocorticoid creams such as hydrocortisone butyrate as prescribed by the doctor, and take antihistamines such as loratadine as prescribed by the doctor for treatment of severe symptoms. 2. Perioral dermatitis: the cause of the disease is not clear, may be related to the long-term use of glucocorticoid drugs, contact with irritating substances, the use of poor quality cosmetics. Often manifested as patients around the mouth erythema, papules, papules, and basal redness can gradually merge into a piece, more local itching, flaking. It is recommended that patients follow the doctor’s instructions for external use of tacrolimus ointment and other calcium-modulated phosphatase inhibitors. 3. Folliculitis: If the skin around the chin is not clean enough to cause bacterial infection and inflammation of the hair follicles and their surrounding tissues, it can cause a circle of red papules around the chin, with itchy symptoms. It is recommended that patients eat a light diet, avoid spicy and stimulating food, can be used under the guidance of the doctor external mupirocin ointment and other antibiotic treatment, if necessary, can be prescribed oral cephalosporins and other sensitive antibiotic treatment. To summarize, it is recommended that patients with redness on the chin go to a regular hospital in time, after a clear diagnosis under the guidance of a professional doctor for treatment, the drug should be used as prescribed by the doctor.