Going to see a doctor for a headache could lead to unnecessary tests and cost big bucks.
One-in-eight doctor visits for migraines or headaches result in a brain scan but only 3-percent of scans reveal a potential problem.
Several national guidelines discourage brain scans for patients complaining of headaches.
A new study from the University of Michigan finds the rate of brain scans for headache has risen since these guidelines were released.
Researchers estimate headache sufferers get $1 billion worth of scans each year.