Hello doctors, My father is suffering from high fever(100.8) from last 20 days and his esr is high (85) and little bit of foot pain ( less haemoglobin 10.5) and no other problem.Initially doctor prescribed paracetamol but it didn't work then he prescribed hifanec-p, azethromycin and few other bacterial and viral infection related. But still his condition didn't improve even after continuosly taking these medicine for 20days. Temperature will rise again within 7 hours of dose. And all test reports ( cbc, Widal, sgpt,urine, kft, lft, PSA), stomach ultrasound and chest X ray are normal.