Hand, not hands and I'll elaborate on that shortly.

I've been getting serious numbness in my right hand and, to a degree, up to my elbow for the last month, maybe 2 but not longer than that.

I'm not new (started on 10 speeds back in the '70s) and I know about changing placement. Little help except riding no handed. I have not changed contact points nor have I changed my overall position. Only changes I can think of that more or less correlate to the problem is switch to Speedplay pedals (from Looks) and some decent weight loss. The loss was not a crash diet though but a steady gradual decline of about 25#.

Why hand and not hands? B/c of a motorcycle accident I ride essentially one handed. I am not an amputee but my left arm has minimal movement and I have no use of my left hand. However, this happened a long time ago (20+ years) and I've been riding since then.

I don't know why I'm having this problem now and know I may have to go looking for professional medical advice but would appreciate any thoughts anyone might care to share.