Sharp pain in the lower back or side that comes in waves is one of the clearest signs of a kidney stone and usually needs prompt evaluation. Other common symptoms include blood in urine, burning during urination, nausea, frequent urge to urinate and, in some cases, fever if infection is present alongside the stone.
- Sudden, severe pain in the back or side, often radiating to the groin
- Blood in urine, sometimes visible and sometimes only detected on testing
- Burning or discomfort while urinating
- Nausea or vomiting during an active stone episode
- Cloudy or foul smelling urine
- Frequent urination in small amounts