What’s causing your pain?
Headaches are like hurricanes. Experts try to predict when they’ll happen and how severe they’ll be, but your throbbing head doesn’t always play by the rules. Complicating the issue is the fact that the causes of a headache are different for everyone. For one person, strong perfume may be a trigger. For another, chocolate completely does her in. But after decades of research, science has pinned down some of the most common explanations for your headaches. And some of those explanations—like these 7—are just plain weird.