The sudden growth of black spots on the face is clinically common in cases of nevus, blackhead acne (a kind of acne), freckle-like nevus, etc., which need to be judged with specific symptoms: 1. nevus: that is, black pigmented nevus, formed by melanocytes gathered at the junction of epidermis and dermis, is a benign skin tumor and does not need to be treated. If it causes discomfort or affects aesthetics, it can be removed surgically. 2. Blackheads: Mostly occur in adolescence, sebum secretion increases due to hormonal imbalance in the body, which leads to obstruction of sebum secretion, causing sebum and keratin plugs to accumulate at the mouth of hair follicles, forming acne. In addition, overexertion, staying up late, and overly spicy and stimulating diet can also aggravate acne; 3. Freckle-like nevus: also called nigra, is the product of increased melanocytes in the basal layer of the epidermis. It can be treated with decolorization by using vitamin A acid ointment and arbutin cream, and also laser to lighten the dark spots. In addition, usually pay attention to skin cleanliness, avoid squeezing and scratching with hands. Eat a light diet, less spicy, stimulating and greasy food, and more vegetables and fruits. Improve your living habits, keep your mood happy and avoid staying up late.