Is numbness in right hand a sign of a stroke?

Carpal tunnel: Could be carpal tunnel or a spine problem. See a neurologist.

Unlikely: Stroke can cause numbness in your r hand, but it would be of sudden onset and maybe involve face, arm and leg, with weakness also. More likely that a nerve compressed at your elbow or wrist causing numbness/tingling. This can happen if you lean on the spot for too long, (sleep in a certain position & wake up with a numb hand). Also carpal tunnel can cause it.