i´d like to come up with the powerball tip,mainly because strenghtening up is good anyways
i got massive problems with my wrists since last year,some fibrocartilage is irreversibly damaged,and i tend to feel the pain a bit up the forearms,in the area you´ve mentioned.sometimes pain in one area is an indicator for problems in another,so overall strenghtening of your arms would be my tip.
yeah okay,go to a doctor to be certain,thats right.
but doctors arent always the solution,mine said i´d have to quit riding by now(august 2012),and with powerball training,different handlebars angle and nutrition(chondroitine etc)i´ve been getting to a point where its possible to ignore an "irreversible damage"
wasnt going to tell the whole story first,just to mention the "doctors solution" bit,sorry