The causes of headache when the patient is working out are mainly considered as follows: 1. It may be caused by elevated blood pressure, which may cause fluctuations in blood pressure after strenuous activity, and the patient may show symptoms such as headache and head swelling, which can be clarified by measuring blood pressure. 2. If the patient has a lot of sweating after intense exercise, it will also lead to a decrease in the patient’s effective circulating blood volume, causing insufficient blood supply to the brain, and cerebral vascular spasm will also manifest as dizziness and headache symptoms. 3, the patient’s headache when working out may be caused by catching a cold, if sweating more during the process of working out, it is easy to be attacked by viruses, causing the patient to have headache, fever, muscle aches and other symptoms.