Acne usually refers to acne, eating sugar may cause acne, the specific need to be divided into circumstances, usually a small amount of sugar is usually not easy to induce acne production, but a long-term large amount of sugar is prone to induce acne. Usually, long-term eating some sugary foods, such as cakes, cookies, honey, watermelon, etc., the body’s blood sugar concentration will increase accordingly, and the plasma insulin concentration increases associated with the onset of acne, because insulin can prompt the follicular membrane cell secretion of androgens, androgen in the body is too high, which can easily lead to sebum secretion, blocking the mouth of the hair follicle, easy to trigger acne. In addition, eating a diet high in sugar for a long period of time will easily cause excess sugar to be converted into fat and stored in the body, while excess localized fat, under the action of Propionibacterium acnes, will easily break down the triglycerides within the fat into free fatty acids, aggravating keratinization and inflammatory reactions, triggering and aggravating acne. Patients are advised to supplement sugar appropriately according to their daily needs, and not to eat a large amount of sugar for a long period of time, so as not to affect their health.