Got a headache? You’re not alone. According to the National Headache Foundation—yes, that’s for real—the problem chronically affects more than 45 million people. Headaches account for 25% of all doctor visits, racking up $1 billion worth of brain scans each year—even though a new study shows they’re probably not necessary, can unnecessarily expose you to radiation (CT) and alarm you with false positives (MRI). So before you make an appointment, take a minute to figure out what kind of headache you actually have—and try a natural headache remedy to treat it.