The common causes of headache after masturbation are cerebral vascular dilatation, elevated blood pressure and other diseases. 1. Cerebral vascular expansion: when men masturbate, the brain catecholamine secretion is too much, which can lead to the expansion of blood vessels in the head, thus causing men’s head swelling and pain. 2. elevated blood pressure: when men masturbate, it will lead to increased nerve excitability in the brain, cerebrovascular blood flow acceleration, a large amount of blood flow impact on the blood vessel wall will lead to abnormal elevation of blood pressure, thus causing headaches. 3. Suffering from other diseases themselves: if men themselves suffer from colds, hypertension and cerebral arteriosclerosis and other diseases, during masturbation, if it causes excessive congestion of the brain, patients who themselves have dizziness and other cerebral discomforts will begin to have headaches. Patients who suddenly have headaches after masturbation and can not be relieved within a short period of time, it is best to go to the hospital for examination to exclude brain lesions and reproductive system lesions, and if there is any abnormality it needs to be treated in time.