The acne on the neck may be related to the cleaning of local skin. Acne, also known as acne, is mainly caused by excessive sebum secretion and blockage of sebaceous gland ducts in hair follicles. It is difficult to clean your neck properly when washing your face at ordinary times, so you should pay attention to the cleanness of your skin when there is acne on your neck. You should clean your skin with warm water or mild facial cleanser, which can prevent the formation of acne due to secondary infection of the skin.. If there is acne, you should use some acne ointment, such as Adapalene cream. If the inflammation is serious and there is redness, swelling and pain, you need to take some anti-inflammatory drugs orally under the guidance of the doctor. In daily life, we should pay attention to cleaning, eat light food, eat less spicy and stimulating foods with high fat and sugar, and take rest to avoid staying up late.