That unbearable side pain… and then finally the stone passes. 😮‍💨 This 3D animation shows how a kidney stone travels through the ureter and comes out naturally without surgery. Not every stone needs an operation — but not every stone is safe to “wait and watch” either. ✅ Small stones can sometimes pass on their own ❌ Bigger / stuck stones can damage your kidney if you delay If you have: • Severe flank pain coming in waves • Burning while passing urine • Blood in urine • Known ureteric stone on