There are more causes of spots on legs, mainly may be caused by pigmentation, varicose veins of lower limbs and melanoma. 1.Pigmentation: normal skin of legs, but local chloasma, black spots, white spots, etc., may be produced by local skin aging, or may be local skin inflammation and infection, left pigmentation, which can be eliminated by way of laser treatment in hospital dermatology department. 2.Venous varicose veins of lower limbs. Patients with varicose veins in the lower limbs have spots due to superficial vasodilatation, resulting in local skin pigmentation, patients need to actively treat varicose veins through surgery or adjuvant therapy, after varicose veins in the lower limbs are controlled to a certain extent, the spots on the legs will also be reduced to a certain extent; 3, melanoma: melanoma mainly manifests as dark spot-like lesions, progresses faster and has a higher degree of malignancy, if diagnosed, it needs to be removed as soon as possible If the diagnosis is confirmed, surgical excision should be performed as soon as possible, and then sent for examination to determine the malignancy or benignity, with local radiotherapy after surgery, the prognosis will be more ideal. In the symptomatic treatment, we should also pay attention to local sun protection to avoid further aggravation of pigmentation, and pay attention to light diet, avoid spicy and stimulating food, eat more vegetables and fruits, and ensure good living habits to help eliminate the spots as soon as possible.