Sudden, severe pain in the side, back, lower abdomen, or groin
Pain that comes in waves and changes in intensity
Pain or burning when urinating
Blood in the urine
Urine that looks pink, red, or brown
Frequent urge to urinate
Passing small amounts of urine
Cloudy or foul-smelling urine
Nausea or vomiting
Restlessness or inability to find a comfortable position
Fever or chills
Trouble urinating
Pain that moves from the back toward the groin
History of kidney stones
Pain that worsens with movement but does not improve with rest