Headache before menstruation may be related to reasons such as bad life habits and PMS, which need to be analyzed specifically. 1. Lifestyle habits: before menstruation, if there is emotional tension and anxiety, lack of sleep, decreased sleep quality, etc., therefore, it will lead to blood vessel spasm in the head, and the symptoms of headache before menstruation will appear. 2. Premenstrual syndrome: Before menstruation, hormone levels in the body will change. With hormonal changes, blood vessels will spasm and the blood supply to the brain will be insufficient, resulting in the symptoms of headache. There may be other reasons for headaches during menstruation, so it is recommended to go to a regular hospital for examination and treatment after clarifying the cause.