In reply to beastofackworth: I always struggle to work out how much rest to give things when they hurt. Basically, after the day I did it, it hasn't been noticably sore, but I can
feel it's not 100%.
I've done the same tendon before, around 3 years ago. It was
much worse. I gave it a couple of weeks of rest and then got around 3 months of physio, it's been fine since. At the time it was so bad that if I layed my hand flat (palm facing up) and pressed my finger down at its tip, it would hurt like hell to resist it (the pain ran right down from about mid-palm almost to the muscle).
With this one, I can press really hard, and it doesn't hurt. I can crimp quite hard, and it doesnt hurt. I think I have strained the muscle/tendon insertion, rather than the tendon itself.
A lot of people would probably have just tried to "climb through it" but I'm trying to do something about it before it becomes a big problem.