There are many types of headaches, and it is very helpful for the doctor to diagnose the cause of the headache by explaining the various conditions of the headache to the doctor when the patient seeks consultation. Primary headaches often occur at a young age, from 20 to 40 years of age, and some migraines are hereditary and may occur at an earlier age. It is not normal for headaches to start after the age of 50, and it may be a sign of other diseases. 2. Characteristics of headache If the headache is related to coughing, exertion, exercise or sexual intercourse, it may be a vascular problem, and the doctor will usually recommend a vascular scan. If you never have a headache but suddenly have a headache within a minute and the pain is extreme, your doctor may suspect a brain hemorrhage. There are two kinds of headaches that often occur in the middle of the night: a “Cluster Headache”, which is a neurological headache, including certain types of migraine; and a “Hypnic Headache”, which is a headache in the middle of the night. Hypnic Headache), which is less common in clinical practice. If something grows in the brain, it is usually a headache in the early morning after waking up. 4. Duration of headache Migraine attacks may last from 4 to 72 hours each time; constrictive headache lasts from 30 minutes to 7 days each time; secondary headache lasts about 15 to 180 minutes each time. 5.Frequency of headache Migraine usually occurs more than five times a week; constrictive headache occurs at least 10 times, ranging from a few hours to a few days each time; secondary headache may occur once every two days to eight times a day. If the headache is accompanied by confusion, weakness of limbs, numbness of hands and feet, weakness of speech, diplopia, fever, or sudden change in the frequency of headache, such as once or twice a month but suddenly becomes daily, it may be a sign of brain tumor, brain hemorrhage or stroke and other lesions. 7.With or without aura One-third of migraine patients usually have signs before the attack, such as pain worsening after exercise, or fear of light or noise, and some people have headache related to food, alcohol or menstruation. Tight headaches are not affected by these factors. 8. The presence of other diseases in the body Subserosal hemorrhage often occurs hours or days after head trauma; meningitis caused by certain viral or bacterial infections of the upper respiratory tract can cause headaches; headaches can be triggered by hypertension in patients with blood pressure over 200; and some neck compressions can also cause headaches.