 [ Symptoms ] i have pain that radiates to my back and down my leg to the knee any ideas [ Disease ] hi the back and leg pain that you have is a different issue from the abdominal pain leg pains can be caused by pinched nerves in the back due to spondylitis or disc prolapse an mri will give a better idea for the abdominal pain appendicitis renal stones etc are some of the causes usg abdomen should be helpful