Black marks left by picking pimples can usually heal on their own. Most black pimple marks are caused by skin infections caused by the pimple itself or by prolonged over squeezing, resulting in damage to the surface tissue of the skin and thus melanin deposition. At first, acne marks are usually red, and as time grows, they will gradually turn dark brown or black. After that, the dark acne marks will gradually fade and disappear with the skin’s metabolism, but the process is relatively long, usually taking about 1 year. If the patient feels that black acne marks affect the aesthetics and wants to speed up the recovery, they can apply salicylic acid, fruit acids and other skin care products appropriately on the affected area, and they can eat more vitamin C rich foods such as tomatoes, oranges and kiwi on a daily basis to promote the recovery of black acne marks. In addition, patients can also go to the hospital’s dermatology department for relevant ultrasonic import treatment to promote skin blood circulation and collagen production to treat black pimple marks. During the recovery period of acne marks, patients should pay extra attention to skin care. When going out, they need to protect themselves from the sun, such as wearing umbrellas, straw hats and sunscreen, and eat less food that can easily cause melanin deposition, such as soy sauce, black rice and black edamame.