A black spot on forehead may be caused by physiological factors, or it may be caused by pathological factors, such as age spots, freckles, etc., which need to choose physical therapy. 1. Physiological factors: if there is a tattoo on forehead area and want to remove it, you can do laser treatment, which can improve the phenomenon of hyperpigmentation. 2. Pathological factors: (1) Age spots: age spots are triggered by degenerative changes of the skin, and sunlight damage also has a certain relationship, which will cause plaques to form on the skin and will lead to a black spot on the forehead. Patients can be treated by chemical peeling, cryotherapy and other physical methods, which can achieve the effect of removing the spots. (2) Freckles: Freckles is a chromosomal dominant genetic disease, which is also related to gender and ethnicity, and if it is strongly irradiated by sunlight, it will cause aggravation of the condition, resulting in a black spot on the forehead. At present, it is commonly used as a treatment with good efficacy, and after the operation, attention should be paid to avoiding light. A black spot on the forehead may also be seen in nevus, melanosis, etc. Patients can go to the dermatology department of the hospital for consultation and symptomatic treatment under the guidance of the doctor.