In reply to marcusinbristol:
Almost certainly tendonitis if you are feeling it while climbing. Try doing some antagonistic muscle training, pushups, dips etc help usually as well as some more specific exercises. Depends on exactly where you got it.
Also mine is worse after a break oddly so I don't stop completely anymore when when it's bad, I've learned to climb through it and manage it - usually gets better after a few sessions, as long as I climb carefully and do all the exercises and stretches.
Post edited at 23:55