Seventeen-year-old sudden frequent headache may be tension headache, migraine, cluster headache caused. 1. Tension headache: seventeen-year-old schoolwork is heavy, usually mental stress, sympathetic nerves in a state of prolonged excitement will release inflammatory mediators and secretory substances, the nervous system caused by a certain amount of stimulation of the sudden and frequent symptoms of headache. 2. Migraine: common in adolescents, migraine is a common clinical primary headache, characterized by episodic, mostly lateral, moderate to severe, throbbing headache, usually lasts 4~72 hours, can be accompanied by nausea, vomiting, sound, light stimulation or daily activities can aggravate the headache. 3. Cluster headache: most common in young men, the onset of one side of the headache, accompanied by bursting pain around the eyes, accompanied by eyelid ptosis and other symptoms. After a clear diagnosis can be given oxygen, treprostinil-like drug treatment, such as sumatriptan and other subcutaneous injection to terminate the headache. There are many causes of sudden headache at the age of seventeen, and it is recommended to seek timely medical examination and treatment for severe cases.