I have been overweight since i was very young, but have never had any serious medical issues before. In the last 2 weeks or so, my right hand has started tingling, rather 3 out of 5 fingers on my right hand have started tingling. The sensation is very similar to that of having them be asleep, only I cannot shake it. It often takes me 15-20 minutes to get the proper feeling back in them. And it occurs 6 to 10 times a day. Today however, the sensation lasted about 4 hours and was accompanied by a strong ache all up my arm and into my shoulder. I am worried about what might be causing this.