I can't bend my thumb. if i hit it just right it bends and won't unbend with out pulling. how long will it take to heal? i was opening a canister and the metal attachment sprung up and hit my hand on the thumb side on the inside of my hand. my thumbs knuc

Several : Several things can be occuring 1. A trigger thumb where the tendon gets transiently locked causing the distal joint ( near the nail) to become stuck. 2. A swollen joint from being contused ( in this cases it sounds like the mp joint) causing the joint to glide less fluidly 3. An injured collateral ligament at the ulnar aspect of the mp joint 4. A small fracture at the joint level 1, 3, and 4 need treatment 2 might get better over the next day of two if it does not get better seek out medical attention.

Your : Your complain is typically seen in patients with trigger finger, which is an inflammation around the tendon. Treatment is quite simple, after your problem is confirmed by your doctor. Medication and some splinting may be all that you need to treat it. Go talk to you doctor about it. Good luck!