The main causes of itchy acne on the face are skin infection, excessive sebum secretion, and abnormal keratinization of follicular sebaceous gland ducts. 1. Skin infection: excessive sebum secretion from the sebaceous glands will stimulate the hair follicles to undergo an inflammatory reaction, leading to the infection of Propionibacterium acnes, which is manifested in the form of pimples, acne, cysts, itching and other symptoms. 2. Excessive sebum secretion: Acne is a chronic inflammatory reaction of the sebaceous glands of the hair follicles, which is caused by abnormal hormone secretion in the body, the sebaceous glands develop too fast or sebum secretion, and its symptoms are localized itching, redness and swelling of the skin. 3. Abnormal keratinization of follicular sebaceous gland ducts: it will lead to obstruction of the caliber of the patient’s ducts, and the secreted oil can not be excreted normally, thus forming pimples and causing facial itching. Acne on the face should be timely treatment, can be used under the guidance of a doctor, usually pay more attention to change the bad habits and irregular work and rest.