My Dad got hospitalized on 2nd Jan due to not getting urine. Doctors performed dialysis and he is getting urine good. He is diabetic patient. He got discharged on 11th Jan 16. After discharge they have written antibiotics injections and tablets. After few days he is getting unexpected fever and shivering. All reports such as urine cultures, bone marrow aspiration, serum creation etc were observed as normal. Later again he got admitted due to less blood. Two packets cell transfers are given. They also given antibiotics. After discharge on next day he is active. Next day again he is again getting sudden shivering followed by fever. We are giving dolo 650 during shivering followed by fever. Please help me out why fever with shivering is getting continuously. If any medication and tablets are required. Please let me know.