why does headaches occur
There are three main causes for primary headaches: 1  Migraine-Migraine headaches can be caused by reduced blood flow to various areas of the cerebral cortex. 2  Symptoms of migraines include sensitivity to light and noise, nausea, vomiting and intense throbbing pain that is usually on one side of the head.
Answers. Best Answer: Just a few of the many many causes of headaches: Stress and anxiety Bright lights Bad sleeping habits fluctuations in hormone levels Artificial sweeteners, such as aspartame, trigger headaches in some people.