Acne marks are often marks left after the acne has subsided and have an impact on the appearance. In general, laser acne mark removal is more effective. The laser can effectively stimulate the regeneration of skin collagen, which, together with its grinding effect, will promote the recovery of acne mark marks to flatness. Acne marks on the face can usually be divided into two types, one is skin tone alteration and the other is skin unevenness. Skin tone alteration, mainly refers to black and red acne marks. Red acne marks are mostly caused by the expansion and growth of blood vessels in the skin, which can be removed and destroyed by a laser that targets the blood vessels, so that the red acne marks will gradually fade away. The skin is uneven. Uneven skin, mainly refers to raised and depressed acne marks. Most of the raised pimple marks are caused by proliferation of damaged cortex, and the raised scars can then be smoothed out with strong pulsed dye laser with appropriate medication; the depressed pimple marks are also caused by damaged skin, and the CO2 fractional laser can be used to encourage skin cells to proliferate, which in turn makes the depressed skin grow and soothe the pimple marks. After the laser acne mark removal, patients should pay attention to protect the trauma, you can apply ointment on the skin surface to prevent the skin surface from breaking blood. They must also pay attention to the cleanliness and hygiene of the treatment area, avoiding water on the operated area on the day after surgery, and pay attention to sun protection after surgery, wearing masks and umbrellas when going out to avoid pain and infection caused by direct ultraviolet radiation on the face. In addition, patients must also control their diet and avoid eating spicy and greasy foods, such as chili and fried chicken, to avoid affecting recovery.