Sudden, severe pain in the side, back, lower abdomen, or groin
Pain that comes in waves and changes in intensity
Pain or burning during urination
Blood in the urine
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
Urine test to check for blood, infection, or crystals
Imaging tests such as CT scan, ultrasound, or X-ray
Medical evaluation if symptoms are severe or persistent