My hand hurts just when i close my hand. it sometimes feel numb when i have it open.

Carpal tunnel: Many different things can cause the symptoms you are having but the most common is carpal tunnel syndrome. In this syndrome the median nerve is pinched at the wrist. It can be made better by using a canvas wrist brace and small doses of ibuprofen or Naprosyn (naproxen). I If this does not improve the symptoms have a further evaluation in person. It is often associated with repetitive movements also.