Many different causes are covered in this article. The article starts out with a description of symptoms of a typically headache. The article then goes on to state that not all headaches are the same type of headache, and they are in fact separated into many widely different categories, one of which being the trigeminal nerve. The article then concludes by stating that often times people will confuse the symptoms of one medical condition for a traditional headache

Read more: Is your headache just a headache? Or something more serious? – WRAL.com