If you have acne on your chin before menstruation, you should take general measures and medication to improve the condition. 1. General measures: Chin acne before menstruation is usually related to hormonal changes in the body. During this period, you should avoid high sugar foods and dairy products, develop good lifestyle habits, and avoid staying up late. Pay attention to skin cleansing and use a mild cleanser to wash your face. 2. Medication: Mild acne is mainly treated with topical medications, such as retinoic acid ointment, adapalene gel and benzoyl peroxide gel. For moderate to severe acne, oral antibiotics such as doxycycline and minocycline can be taken. For female patients with hyperandrogenic manifestations, they can also be treated with birth control pills and spironolactone. The old chin acne before menstruation can be improved through life management and other ways, if necessary, with the doctor’s medication, specific drugs need to be used under the guidance of the doctor.