Dear Dr, I was operated for TKR on 16Nov2015 & am religiously going through my exercises myself as advised by my Physiotherapist Dr. In addition I am cycling for 15 mins twice daily & 1/2km walk twice daily. Last night around 12pm I developed burning sensation on the knee cap while sleeping & it would come up for a few seconds & go off & come up again after a minute or so. It carried on for an hour or so. Am ok now but would request you to let me know the reason &further action.