DEAR DOCTOR K: I regularly get terrible migraine headaches. My doctor has prescribed medication, but I still think I should have a brain scan to make sure there's nothing more serious going on.
DEAR READER: Severe headaches cause both misery and fear. Obviously, the fear is that something serious, like a brain tumor, may be causing the headache. Still, the pain of even a severe headache rarely comes from something catastrophic like a tumor.