Spots on forehead are mainly caused by chloasma, age spots, solar dermatitis, etc., which need to be treated by physical, surgical and oral medication under the guidance of doctors. 1. Melasma: Melasma is mainly caused by heredity, ultraviolet radiation, etc. The lesion will lead to damage of the skin barrier function, causing patients to have the symptom of spots on forehead. Physical treatment such as laser and intense pulse light can be used. 2. Age spots: age spots, also called seborrheic keratosis, are mainly caused by sun exposure, skin aging, etc. The lesions will lead to damage to the exposed parts of the skin, causing patients to develop symptoms of spots on the forehead. It can be treated with freezing, laser or electrocautery. 3. Solar dermatitis: solar dermatitis is an inflammatory reaction of the skin caused by sunlight exposure, sunlight exposure will lead to skin damage, so that patients have symptoms of forehead spots. It can be treated with oral chlorpheniramine maleate tablets, loratadine tablets, topical glycerite lotion or glucocorticoids. Patients with spots on forehead should pay attention to sunscreen in daily life, and try to wear sunscreen clothing and sun hat when going out, so as not to aggravate the condition.