Urinary tract infections cause burning sensation while passing urine, back pain, urethral discharge
, fever, chills and blood in
the urine. Diagnosis can be made by getting an urine examination done along with a urethral swab examination. What is your age? Testing for sexually transmitted diseases also need to be done.
Ultrasound will reveal if any abnormality present in the appearence of kidneys, urinary tract and also for the presence of stones in them.
Consult your urologist immidiately.