i got a blister on my knuckle from punching hard surfaces etc and now there's a blister there. its not painful at all, but any advice on how to get rid of it?
It will either slough off by itself or will get torn off by your movements. Either way, the skin underneath will be a bit sensitive. Slowly increase your training or wear some sort of glove so the knuckles don't get too blistered in the future.