This condition is called ______ in the kidney and ______ in the bladder. This may form because of a small infection which leaves a little nidus (cavity) and then there's a deposit of salts, calcium or oxalate salts around it and that becomes a ______. When it tries to pass down from the kidney through the ureter it causes severe pain which has been compared to the pains of labor. This type of pain is usually felt from the back to the front (loin to the groin) and thats because of the nerve supply, the _____ nerve travels in that direction. These people also have hematuria (because the stone irritates the lining and causes erosion), people also have nausea, vomitting, and since they also have UTI this also causes a fever.