Unnatural levels could cause pain. More likely causes would be dehydration or addiction to things such as caffeine. Drinking lots of water or powerade can help rehydrate
Migraines are sometimes caused by cold food products. Have you ever had a headache eating slush? In some people this can cause a migraine.
Migraine headaches are induced differently for each person...
Oh, the many causes... Diet/Allergy: Many foods can trigger migraines. We hear about this all the time. Wines, aged cheeses, and chocolate being the most popular culprits. What is not often talked...
Having them now, its awful! Some say you get them when you come off the HCG and others say you get them the days you take the shot. That really doesn't help clear things up. :)