Thanks for writing to us.
Normally Rejection of such devices by the body is not a problem. Rejection is usually restricted to living implants which can incite the immune system of body like a renal transplant or a liver transplant
. The more problematic and serious thing associated with pacemakers is infection in the pacemaker pocket, which has serious consequences. i would like you to see your cardiologist and seek his opinion on this issue on priority. The pain in near by joint can be because of the inflammation in the pocket itself or it could be the result of long time immobility. This issue again requires examination.
since the possibility of infection can not be ruled out without examination , you must see the cardiologist.