4g off, wifi on, smart cover on. Actually trying to listen to speaker closely and noticed warmth from the iPad. To get a better feel for the warmth, put cheek on back of iPad.

Got a small headache afterwards, which isn't worrisome by itself. I didn't think anything of it until I realized there's a lot of magnets, etc in there (iPad+smartcover).

Any reason to worry? Ughhhh.