While sleeping occassionally I had numbness problem in my fingers. Mostly small finger and ring finger. Sometimes I have also noticed it in my full hand when I sleep keeping my hand on my forehead. I have also noticed this numbness in my legs when I seat for longtime in a indian toilet. I am not sure if this is normal or I should see a doctor. While sleeping it doesn't happens always but I notice it once in 3-4 day. While playing game on mobile while lying down, at that time also I have noticed it in my fingers.