Some patients often refer to acne as “pimples” or “zits”. In fact, we do not use the term acne in medicine because it can be misleading to the general public and can lead people to believe that it is a disease specific to adolescence. Let’s look at the definition of acne: Acne is a chronic inflammation of the sebaceous glands of hair follicles that occurs in adolescent men and women. The prevalence of acne is equivalent to high prevalence and multiplicity. In fact, clinically, we find that the onset of acne is not only in adolescence, but can occur before puberty, and some people even continue to have acne into their 20s and 30s. Acne, a chronic disease, is critical to maintain treatment for a long period of time. Patients should use medication rationally under the guidance of a doctor to avoid the occurrence of cosmetic lesions such as post-inflammatory discoloration (commonly known as acne marks) and atrophic scarring (commonly known as acne pits); and to avoid adverse reactions.