Acne is a chronic inflammatory skin disease of hair follicles and sebaceous glands. It is mainly caused by excessive secretion of sebaceous glands, blocked openings and secondary bacterial infection. It is often related to endocrine, diet and mental factors. After you have acne in your jaw, you should first pay attention to the light diet and eat less spicy and greasy food. Then, ensure adequate sleep, do not stay up late and get angry. Do not squeeze acne to prevent inflammation from aggravating and spreading. It can be used externally to treat acne, such as clindamycin gel, benzoyl peroxide gel, adapalene gel, etc. In serious cases, doxycycline, minocycline or clarithromycin can be taken orally. Attention should be paid to maintaining sufficient treatment course to avoid relapse due to premature drug withdrawal.