What Causes Numbness In Palms After Having Wrist Fracture?

Thank you Dr. I am from INDIA.I am a woman of 65 yrs and had fractured my wrist 2 months ago.It was a hairline fracture.After 40 days the Plaster was removed but now I am developing numbness and cramps in my palms and fingers.What could be the reason pl. ......................vasanthi..............