Hi Dear, Welcome to HCM team. Understanding your concern. The numbness in hand after sleep as you describe is very common occurrence which is most commonly related to sleeping position .While sleeping people put there body weight on their arm usually side sleepers ,which leads to compression of nerve in arm and cause numbness . Most of the times the numbness is short lived .What you can do is change your sleeping position and put firm and thick pillow under your head while sleeping .It is not the case of wrist drop. If this event occur occasional and shot lived it will be corrected simply by few changes in sleeping position ,But if it occur very frequently and and is not short lived then you should consult a doctor .Because it can be a sign of some more serious problem like nerve irritation and stroke . Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari