symptoms of kidney stones Severe pain in the side and back, below the ribsPain that spreads to the lower abdomen and groinPain that comes in waves and fluctuates in intensityPain on urinationPink, red or brown urineCloudy or foul-smelling urineNausea and vomitingPersistent need to urinateUrinating more often than usualFever and chills if an infection is presentUrinating small amounts of urine. Consult Urologist.