The symptoms of renal colic alone are often highly suggestive of passage of a kidney stone. A patient may complain of severe flank or abdominal pain radiating to the lower abdomen or groin area. The pain of renal colic is described often as sharp, severe, intermittent, and occurring with abrupt onset. Nausea and vomiting often accompany these symptoms. If infection and obstruction is present, the patient may experience fevers and chills. Stones can, however, present without any symptoms. Frequent urination or the constant urge to urinate are symptoms that are commonly seen as the stone is passing from the ureter into the bladder.