Neck acne may be related to endocrine factors, abnormal keratinization of follicular sebaceous gland ducts, genetic factors, dietary factors and other reasons. 1. Endocrine factors: If the level of androgen is relatively high, it can increase sebum secretion, and acne can appear on the neck. 2. Abnormal keratinization of follicular sebaceous gland ducts: the epithelial cells and sebum shed by the hair follicle cannot be discharged normally, and acne can be formed. 3. Genetic factors: A family history of acne usually increases the probability of acne. 4. Dietary factors: such as fat, sugar, etc. can increase sebum secretion, which can cause acne at the neck. Those who have acne on the neck who have the need to remove it should go to the hospital in time and under the guidance of the doctor for standardized treatment.