Coffee spots belong to pigmented skin diseases, mostly occurring on the face and trunk, but also on the limbs unilaterally or bilaterally, mainly because of genetic diseases, melanin deposition, birthmarks, etc. 1. Birthmarks: If the spots are present at birth and there is no obvious increase, they may belong to birthmarks, and will generally fade slowly with the growth and development of the child; 2. Genetic diseases: Coffee spots may be related to genetic mutations, and may The multiple coffee spots may be closely related to neurological diseases, such as neurofibroma, which may appear at birth or in early childhood, and some of them may appear in adolescence, and generally have no conscious symptoms; 3, melanin deposition: direct ultraviolet radiation will lead to an increase in melanocytes, generally showing epidermal damage, increased pigment synthesis, and increased melanocytes in the basal layer, which will lead to the appearance of coffee spots. The appearance of coffee spots. If the coffee spots keep increasing, you need to consult a doctor and have a corresponding examination. In daily life, you should pay attention to eat less spicy and stimulating food, eat more carrots, celery and other vegetables to supplement vitamins, and take good sun protection measures when you go out.