I searched google images for migraines, and found this image -- seems about right. I had a headache from Sunday until mid-day today -- about 4 days. I guess for lack of a better term, I'll call it a migraine. Sometimes I felt nauseous, light didn't feel great. I took every combination of pain reliever in the house and nothing worked. At night it seemed worst -- just full out pain, and during the day it was there, sometimes less painful for a few hours, then back again. Actually, lying down and resting made it worse. I did some exercising in a class and with my trainer, and those didn't make it worse -- I didn't feel it at those times. But I couldn't sleep very well, tossing and turning more than usual. I tried some ice last night, which didn't do anything either. It finally went away when I was in the dentist's chair today -- some cure:-)