Hello Thanks for query .Your mother in law has severe pain in abdomen ,vomiting due to impacted stone in lower ureter . Please consult qualified Urologist for clinical examination and get following basic tests done to confirm the diagnosis. 1) Urine routine and culture. 2) Ultrasound scanning of abdomen and pelvis . Give her following treatment for a week 1) Antibiotics to prevent infection 2) Tab Tomsulosin once daily which helps to dilate the ureter and thereby helps to pass down the stone in to bladder . 3) Dratovarine twice daily has similar action like Tomsulosin 4) Pain killers like Cyclopam twice daily . 5) Plenty of fluids orally or I.V fluids to produce more urine If these measure fail to pass down the stone within a week ,she may need to undergo an endoscopic surgery of URS to remove the stone from ureter Dr.Patil... Further treatment will depend upon result of these tests and final diagnosis