The sudden appearance of small black spots on the face, if it is a mole generally do not need treatment; if it is post-acne darkness, you can use Vitamin A cream; if it is a variety of reasons for the formation of the spot, according to the situation to choose the appropriate way of physical therapy. 1. Moles: The sudden appearance of small black spots on the face may be moles, which generally do not require special treatment if they do not affect daily socialization and facial aesthetics. 2. Post-acne darkness: the sudden appearance of small black spots on the face, may also be due to acne caused by melanin deposits, the patient can be used externally with retinoic acid cream, cumulus glycoside ointment and other medications, while paying attention to strengthen the sun. 3. Spot: the sudden appearance of black spots on the face may also be freckles, sun spots, seborrheic keratosis, etc., mainly related to heredity and sun exposure, need to be identified by a professional physician, according to the situation can be taken to the laser and other physical methods to remove. There may be other reasons for the sudden appearance of small black spots on the face, and it is recommended that the patient should consult a doctor in time to clarify the cause of the disease, and then carry out standardized treatment or therapy under the guidance of the doctor, so as to avoid delaying the condition.