Most of the fluids should be purified water. Possible Complications Urinary-tract infection. Damage to the kidney, necessitating surgical removal. Recurrence of stones. Prognosis Large stones usually remain in the kidney without symptoms, although they can damage the kidney.
Small stones pass easily into the ureter through the urine.
Stones that are not small enough to pass with ease cause excruciating pain. These usually pass in a few days. If the stone stops and blocks urine, it must be removed to prevent further kidney damage.