Acne around the lips may be caused by acne, contact dermatitis and other diseases. 1. Acne: the etiology is still unclear, androgen level changes, abnormal keratinization of follicle cells and other factors may induce this disease. Patients will have localized pimples, pustules, acne and other symptoms, mostly on the cheeks, jaw and other parts of the body. 2. Contact dermatitis: the cause of the disease may be related to the infection caused by skin contact with exogenous substances, common exogenous substances are cosmetics, skin care products and so on. Patients will have erythema, edema, papules and other symptoms. If contact dermatitis occurs around the lips, it may lead to acne around the lips. If there is a situation of acne around the lips, it is recommended to go to a regular hospital for examination to clarify the cause.