Usually, kidney stones do not cause symptoms unless they block the flow of urine. Pain is the most common symptom of a kidney stone that has blocked the flow or urine. The pain usually starts suddenly and quickly becomes severe. The pain often begins in the back or flank and spreads to the groin on one side.

Common symptoms of a kidney stone include:

• Back pain
• Flank pain
• Abdominal pain

Less common symptoms of a kidney stone may include:

• Hematuria:
• Blood in the urine
• Red or pink urine
• Blood clots in the urine
• Constant urge to urinate
• Flank tenderness
• Inability to urinate
• Nausea
• Excessive sweating
• Vomiting