i'm with sskguy. the only experience i've had with 'buzzing' was early smptoms of rsi/carpal tunnel. check out a physiotherapist if you can. it might only affect you in specific circumstances now, but it almost always gets more painful and on more boards and faster.
I went to a hand surgeon in Connecticut and he first gave me an injection, lidocaine and cortisone, into both wrists, which took care of the problem for about 3 or 4 months. He said it would likely be temporary. I tried wrist exercises and therapies, but nothing worked for me except surgery. On the up side, since the surgeries, about 10 years ago, I haven't felt the sensation.
As an aside, it took about six weeks post-surgery before I my wrists were back to normal. And I did go through some physical therapy for a short time when I was recovering.