The sudden appearance of small black moles on the face usually does not disappear automatically, and the reason for this phenomenon is mainly due to the abnormal increase of melanocytes in the skin, which can be treated by laser mole spotting. The sudden appearance of small nevi on the face is a relatively common phenomenon, and the specific cause is unknown. It may be related to genetic factors, or it may be caused by local skin damage, such as sun exposure or minor trauma, which leads to the appearance of small nevi, which are usually difficult to fade on their own and have a small impact on the human body. If more pigmented nevi appear in a short period of time, you need to pay attention to the development speed of the pigmented nevi, whether they expand significantly in a short period of time, or become irregular from the shape, and whether they are accompanied by itching, breaking and bleeding. If there is no such condition, you can continue to observe and do not need special treatment. If you feel that it affects your appearance more, use laser to remove the relatively small pigmented moles. Avoid skin care products with strong stimulating properties, otherwise the mole may appear repeatedly or other adverse effects may occur.