Headache patients should consult the doctor as follows: 1. New onset of mild headache: consult the doctor in the outpatient clinic, have a cranial CT or MRI examination, and take oral painkillers to observe the effect if there are no special symptoms. If the effect of medication is poor, further examination should be carried out to clarify the diagnosis; 2. Sudden severe headache: if the patient is elderly, he/she should consult the emergency room quickly to prevent the recurrence of cerebrovascular disease; 3. Slow-onset long-term headache: bring the past cases and oral medication, which can help the doctor to diagnose and treat the headache effectively and reduce the cost of examination at the same time.