Your joints are achy, stiff, and swollen. Run-of-the-mill arthritis might be to blame. But so could these other lookalike conditions.
A racing heart may seem like a troublesome problem, but in most cases, it's a normal response to something else going on in the body.
No matter how clean and well-brushed you are before bedtime, you probably still wake up with these embarrassing but common bodily reactions.