Repeated chin acne may be acne, whisker folliculitis, contact dermatitis, etc. It can be treated with topical treatment, oral medication, and reduction of irritation. 1. Acne: Acne is a skin disease related to the secretion of androgen, some patients will have an acute attack after eating high-fat food or high-sugar food, conditioning to a light diet, relaxation, and ensure adequate sleep. The medication can be applied locally with retinoic acid ointment, such as tazarotene gel and adapalene gel. Usually also pay attention to personal hygiene, do not often use hands or other pollutants to contact the chin area, to prevent repeated infections. 2. beard folliculitis: this disease is also called beard sores, mainly men in the shaving beard or the use of beard toiletries produce damage and infection, you should correctly shave the beard, shaving utensils for disinfection, to reduce follicle damage and infection, you can avoid repeated acne. 3. Contact dermatitis: allergic to certain foods or chin often contact with some special substances, this situation will lead to contact dermatitis should be away from allergens, the elimination of allergens can be avoided repeated episodes, acute episodes of glucocorticosteroid ointment, such as mometasone furoate cream, tretinoin cream and so on. Many reasons can lead to repeated chin acne, you should consult a doctor in time, clear reasons for targeted treatment, if you need to use drugs, should be used under the guidance of a doctor to avoid aggravation of the condition.