Lower ureteral stones of 7.5mm can be treated with medication first, if the stone is not discharged after a period of medication, extracorporeal lithotripsy or ureteroscopic surgery can be considered. Ureteral stones can cause severe pain in the lower back and abdomen accompanied by nausea, vomiting, frequent urination, urinary urgency, hematuria, etc. Lower 7.5 mm ureteral stones can be treated with lithotripsy medications, such as lithotripsy granules, nephrolithotripsy, etc., and antispasmodic and analgesic drugs, such as diclofenac sodium suppositories, etc., as well as drinking plenty of fluids, and doing more bouncy exercises. If after a week of follow-up ultrasound stones are still not discharged, you can consider extracorporeal shock wave lithotripsy or ureteroscopy surgical treatment.