Hello, the earlier the birthmark is treated, the higher the possibility of cure. Coffee spot is a hereditary skin disease. In this disease, the melanin in melanocytes and keratinocytes is increased, and the activity of melanocytes is hyperactive, which produces a lot of melanin and forms pigmented spots. The pathological changes of coffee spot include the increase of epidermal melanin, especially basal melanin, the huge melanosome in dopa-stained melanocytes and basal keratinocytes, and the normal or slight increase of basal melanocytes. ; Choosing a suitable hospital, patients and their families should choose a regular hospital that is conducive to controlling the disease according to the actual situation of patients. They must not blindly seek medical treatment and believe in rumors and advertisements, so as not to delay their illness. I wish you a speedy recovery.