Neck acne is a chronic inflammation of local sebaceous glands and hair follicles, which is mainly caused by secondary infection caused by excessive secretion of local sebum blocking pores. At ordinary times, pay attention to local hygiene, take frequent baths, and use sulfur soap to clean to reduce the secretion of sebum and the formation of acne. The diet should be light, eat more fresh vegetables and fruits and foods rich in vitamins, eat less spicy, stimulating, fatty, and polysaccharide foods, pay attention to rest, ensure adequate sleep, and avoid staying up late, which can effectively reduce the occurrence of acne. The above health science knowledge is only for reference. The specific situation needs to be checked in a regular hospital and judged by a professional doctor. Do not diagnose or treat yourself.