Headache for several days: 1. Migraine attack, the patient usually has a history of migraine, when poor sleep, tiredness, anxiety, fire or after a cold can trigger migraine. In the acute stage, the patient can have headache, and some serious patients can also have nausea, photophobia and lacrimation. 2. A headache for several days can also be caused by poor sleep, especially poor sleep quality or short sleep time in recent days can lead to headache, for this case the main focus is to adjust sleep. 3. A headache for several days can also be seen in infectious diseases, especially with a history of external infection, the patient can have Viral encephalitis, meningitis or bacterial encephalitis, meningitis. The headache may appear in the early stage, but most patients will have fever and need to consult the neurology department for lumbar puncture examination if necessary. 4. Headache for several days can also be caused by intracranial occupational disease, which is mostly slow onset and the cause can be determined by head CT or MRI. 5. Patients with a history of hypertension should be advised to monitor their blood pressure regularly and take oral antihypertensive medication regularly.