If your urine culture returns as negative, then other very rare causes include kidney
, urinary retention, pelvic masses and
bladder tumors. If you have had bladder neck surgery for incontinence, there is the possibility of bladder outlet obstruction, or "foreign body" in the bladder, which can slso cause the symptoms. you need to get worked up by a urogynecologist or urologist for these, especially if there is also urine leakage.