5.3.15 around 2.20pm

I wanna start detailing my scooter but my middle finger on my left hand feels like it is badly sprained! I didn't get it jammed or bent back! It's a mystery what happened but it's killing me! I find it very challenging to try and do anything with my hands! I did empty all my trash but that was hard cause I need my hands to work together to tie off a trash bag! I've tried to crack my knuckles and everything, it's absolutely killing me!