There are more causes of headache, and the common ones are as follows: First, hypertensive disease. High blood pressure can cause headache, nausea and blurred vision due to increased intracranial pressure, which requires regular blood pressure monitoring and regular medication. Low-salt diet is also necessary. Second, sinusitis. In addition to headache, it is also accompanied by repeated thick nasal discharge, which requires active anti-inflammatory and cold prevention. Third, vascular neuropathic headache. The main manifestation is throbbing pain in the head, which is accompanied by nausea and vomiting when it is severe. It is easy to aggravate under the stimulation of cold, bright light and activity, so it is necessary to actively use painkillers. Fourth, intracranial infection leads to increased intracranial pressure causing headache, and some of them will be accompanied by nausea and limb dysfunction. Fifth, trigeminal neuralgia. Especially, the ophthalmic branch of trigeminal nerve mainly manifests as pain in the forehead. When the pain is obvious, it needs active nerve nutrition and pain relief treatment. Do not take pain medication blindly when frequent headaches occur. It is necessary to actively go to the hospital and identify the cause of the headache.