How long does acne usually heal?

Acne is an adolescent disease, generally self-healing after puberty. Generally, it is the beginning of puberty development, about 14-25 years old. However, due to the improvement of living standards and increased personal pressure, there are also acne patients over the age of 25, known as post-adolescent acne, the causes of which are more complex, in addition to the patient's own hormone levels, there are many incentives, including greasy diet, stay up late, emotional anxiety, tension, and poor mood. If the patient's face shows acne-like rash, the degree of illness varies, and the time of regression varies. If the acne is closed, it may exist for a long time; if the inflammatory rash, that is, the red pimple with pus head at the top, it will disappear relatively quickly. The pus head may appear in about 1 week. The red pimple needs at least 4 weeks to gradually flatten out. After the rash disappears, the residual red mark may take several months to resolve. If cyst, nodular acne, if not treated, may last, may also gradually subside after a few months; if more serious acne containing more purulent secretions, it needs surgery after purulent can subside.