In most cases, closed pimples can heal themselves. In fact, closed acne is mainly due to the body’s secretion of a large amount of sebum, especially after the facial sebum secretion, not timely discharged outside the skin surface, stagnation in the sebaceous gland ducts to form a certain amount of sebum embolism, which is usually seen in whiteheads acne, or called “closed acne”. Closed pimples are clinically harmless, but over time, some of their contents can be mechanized and absorbed, so they will gradually heal themselves. However, closed pimples, once infected by condition-causing bacteria, are prone to inflammatory acne, which is often referred to as “pimples”. Therefore, closed pimples need to be treated.