i've just noticed i have a weird lump on my left forearm near my wrist. It doesn't hurt and seems to sit on the muscles that are associated with thumb movement. I looked at a few diagonisis but couldn't find anything that matched.
I do do a quite manual repetative job that puts alot of stress on my arms and wrists but as it doesn't hurt at all i don't think it's RSI related.
I'm not particularly worried, just curious :D