hi. noted history of abdominal pain while urinating, with radiation to the leg and lower back. it is possible that you have kidney or ureteral stones. other causes, such as infective process, must be ruled-out. it is best if you consult with a doctor, preferably a urologist, for physical examination and clinical evaluation. diagnostics (such as urinalysis, ultrasound, etc.) and management (medical and/or surgical if indications are found) will be directed accordingly. if it is indeed a stone, low salt diet is also recommended. hope this helps. good day!! ~dr.kaye