Women’s forehead spots may be caused by patients’ long-term exposure to ultraviolet radiation, endocrine diseases, chloasma and other reasons, which need to be analyzed specifically. 1. Ultraviolet irradiation: ultraviolet irradiation of the skin will lead to an increase in the melanin synthesized in the bottom layer of the skin, and the pigment will form plaques with the color of yellowish-brown or brown when it is continuously deposited on the surface of the skin. 2. Endocrine diseases: when the human body has an imbalance of hormone level secretion due to pregnancy, long-term use of contraceptive pills, drug abortion, etc., the metabolic wastes of the body are deposited on the face, which will also lead to spots. 3. Melasma: brown patches appear on the face due to heredity, endocrine disorders, sun exposure and long-term emotional depression. It should be noted that forehead spots may also be related to local skin inflammation and other factors, so it is recommended to go to the hospital in time and give targeted treatment after clarifying the cause of the disease.