Symptoms return after you have finished treatment.
Painful urination is accompanied by vomiting, fever, chills, bloody urine, or abdominal or back pain. This may mean potentially life-threatening kidney disease, a prostate infection, a bladder or kidney tumor, or a urinary tract stone. Seek medical help immediately.
The burning is accompanied by a discharge from the vagina or penis. This may be a sign of a sexually transmitted disease, pelvic inflammatory disease (PID), or other serious infections. See your doctor without delay.
You experience any persistent pain or difficulty with urination. This may also be a sign of a sexually transmitted disease, a vaginal infection, a kidney stone, enlargement of the prostate, or a bladder or prostate tumor. See your doctor right away.