My 36 year old son is a certified master bicycle mechanic and over especially the past two years has developed worsening tendonitis in both his hands, to the point where his hands during rest will automatically clench into a fist and they are very painful and tingling. With his hands outstretched, they look very strange and the tendons are quite pronounced and he has to stretch out his hands frequently to be able to just move them. He is very good at what he does, but his passion and love for bicycles is hurting him and I am concerned that as he becomes older, this condition may worsen. Thank You.