How Should Back Abscess, Fluctuating Blood Urea, Leg Pain, Weakness Be Treated?

MY FATHER SUFFERING FROM BACK SIDE ABSCESS BESIDE SPINE BUT SOME DR. DON'T GET HIS PROBLEM, THEY SHOULD GAVE HIS PAIN KILLER TO MUCH THAT'S WHY PROBLEM ADOPT 1 MORE CASE NAME IS FLUCTUATING BLOOD UREA.BUT TIL NOW AIIMS DR. DIAGNOS AND CONTROL IT'S CASE. BUT PAIN IN LEFT LEG IS STILL HAD AND WEEKNESS ALSO.NOW BLOOD UREA 24,CREATININE 1.18,HEAMOGLOBIN 9%.PLEASE DR. SUGGEST ME WHAT SHOULD I DO BEST FOR MY FATHER