Half headache may be related to migraine, temporal arteritis, head trauma, intracranial occupation and other causes. 1. Migraine: manifested as recurrent, throbbing and severe headache on one side or both sides, which may be accompanied by nausea, vomiting and photophobia. 2. Temporal arteritis: temporal arteritis can lead to swelling and narrowing of temporal arteries, causing blood supply obstruction and symptoms of headache. 3. Head trauma: If one side of the head is hit and other injuries, it can cause local tissue swelling and pain. 4. Intracranial occupation: Intracranial occupation lesions such as intracranial tumors compressing blood vessels or nerves can cause headache. It is recommended that people with headache go to regular hospitals in time to clarify the cause of the disease and carry out standardized treatment under the guidance of doctors.