Migraine is not necessarily a unilateral headache, but mainly a severe unilateral headache with paroxysmal onset, but in severe cases it can involve the whole head, mostly accompanied by nausea and vomiting, and is a kind of headache caused by episodic cranial vasodilatory dysfunction. The symptoms include: aura symptoms before the headache, such as blurred vision, photophobia, flashes or sparks in front of the eyes, eye swelling, and hemianopia, etc., lasting for several minutes. Recurrent one-sided or bilateral headaches, mainly in the frontotemporal region, may also extend to a full headache. The headache is throbbing, dull or stabbing. It may be accompanied by nausea and vomiting, often with photophobia and closed eyes and tears, preferring to lie still in a dark room. Some patients have facial flushing, sweating, and increased or decreased blood pressure. An attack lasts from a few hours to a few days. Ergotamine caffeine is used to relieve symptoms at the onset of an attack. Everything is normal during the interictal period. There are no positive signs on neurological examination during the seizure period. You can go to your local regular hospital for further examination to clarify.