If he wants to eat every time, I wouldn't worry about it. It might be a growth spurt, and then it won't last. If he seems to be waking up for no reason, this sounds weird, but try getting a night light. My son became afraid of the dark around that age. If he woke up and his room was dark, he'd start crying. I got the night light so I wouldn't trip over or bump into anything when I went to take care of him. And lo and behold, the problem stopped.
at 2:41 PM on Oct. 6, 2008