My oldest DD had the same thing a few years ago. Just an odd odor around her head. I made her shower, wash her hair, brush her teeth and the smell was still there. I thought maybe there was something spilled on her pillow making her head smell. When I checked her pillow case, there was a small spot of puss and blood. She had a ruptured ear drum. I think it's odd that it didn't hurt like heck, but she never complained once.