Once stones form in the urinary tract, they often grow with time and may change location within the kidney. Some stones may be washed out of the kidney by urine flow and end up trapped within the ureter or pass completely out of the urinary tract. Stones usually begin causing symptoms when they block the outflow of urine from the kidney leading to the bladder because it causes the kidney to stretch.
Usually, the symptoms are:
- sharp, cramping pain in the back and lower abdomen, which may spread to the groin.
- blood in the urine
- nausea and/or vomiting
- the need to urinate more often
- a burning sensation during urination