NEVER take the glove off till after the match, that way you know where all the body parts are.I broke a finger whilst in goal before, mid-way through the first half, carried on playing the rest of the first half & intended to wrap it up & plough through the 2nd half. Took the glove off at half time & decided against it as my knuckle had doubled in size.
Also twisted my knee playing 5 a-side, rested it for 6 (or so) weeks, & began playing again only to hurt my knee again, I did this for roughly 2 years before finally getting it looked at. Turned out I'd ruptured my cruciate & torn the cartilage, 4 & a half years after the op & i've not had any problems since (touch wood!)