Hi thanks for your question. You have burned your middle and ring finger of your right hand and now they are getting locked and giving you sever pain. Don’t take it lightly as you are having artificial heart valve and infection in burned tissue is very common and it is dangerous for artificial valve. You have to take antibiotics and burned fingers need alternate day antiseptic dressing. Consultation with a general surgeon or orthopedician is advisable in this regard. You have also got operated yourself for trigger finger and the operated hand looks bruised and discolored.This due to the effect of anticoagulant(what you call as blood thinner) which your taking for artificial heart valve. Hope this answers your question.