What Causes Numbness And Tingling Sensation In The Hands And Arms?

I have experiencing numbness and tingling in my hands, wrists, and up my arms while sleeping. It's been waking me up multiple times at night. I am 27, 5'4", 110 lbs. This started happening in the last month or two. I have also started doing a lot of yoga (lots of weight on the wrists and hands) for about the same amount of time, could the two be related? How should I deal with this problem?