Every night DS, 26 months, falls asleep totally covered by his duvet. I've assumed it started because he was scared of something, though now I don't really know if he is scared or has developed a habit of doing it. I normally go up to his room about half an hour after putting him to bed to find him hot and sweating under the duvet.
Is this common? Do you think it is dangerous?
I started leaving a light on in his room but that hasn't stopped this behaviour.