Melasma, also known as liver spot, is a kind of facial melanosis, which is a pigmentation spot occurring on the face. It is a light brown or yellowish brown spot with clear border and irregular shape, symmetrically distributed near the eye orbit, forehead, eyebrow arch, nose, cheeks, lips and perioral area, without conscious symptoms and general discomfort. Melasma is mainly caused by endocrine disorders, mental stress, various diseases (liver and kidney insufficiency, gynecological diseases, diabetes), as well as lack of vitamins in the body and stimulation by external chemical drugs. There are many treatment methods for melasma, among which laser treatment has obvious advantages, such as safe treatment process, little pain, complete removal of spots, no scars and skin rejuvenation. At present, laser treatment for melasma has become the mainstream treatment method. The principle of laser melasma removal is to use high-intensity light beam to penetrate the skin with specific wavelengths, and act on the pigment cells to make them decompose and reduce or remove the pigment particles through tissue cell phagocytosis and absorption or epidermal metabolism, so that the color of melasma will become lighter and finally disappear completely after several treatments. Of course, the causes of melasma are complex, so while laser treatment, you can make adjustments for various causes; eat more foods containing vitamin C, or take vitamin C and vitamin E at the same time; maintain good living habits, do not stay up late, do not drink, and be in a relaxed mood, etc.