The headache on the third day of menstruation is considered to be related to endocrine disorders, emotional tension and cold. 1. Endocrine disorders: when women menstruate, the level of estrogen and progesterone in the body drops significantly, indirectly affecting the female nervous system, so some patients will have a headache, anxiety and other mental symptoms, to be cleaned up after the symptoms can be relieved on their own. 2. Emotional tension: If a woman is under great pressure at school and work, it will easily lead to excessive mental tension, which may lead to headaches and other discomforts. 3. Cold: Women’s body resistance decreases during menstruation, so it is easy to suffer from cold weather stimulation, so there may be headaches, runny nose and other discomforts. For patients with headaches on the third day of menstruation, it is recommended to go to the gynecology or neurology department of a regular hospital, improve the cranial CT and other tests if necessary, and then actively treat under the guidance of the doctor after clarifying the cause of the disease.