| Re: SI Joint or Sciatic
Welcome to the board.
Usually pain coming from a SI joint can bereplicated by an experienced physical therapist manipulating the patient through a series of body positions...perhaps not all issues that might cause SIJ pain, but any caused by SIJs being out of position.
Siince you mentioned hip I am wondering if you may be having issues with the piriformis. You might look up "piriformis syndrome" and see if anything there matches what you are feeling.
The piriformis is a strong muscle that attaches by the SI joint and runs across the buttock and then attaches over by the hip. If it becomes taut or inflamed (which it could from a fall) it creates a feeling of pain in the hip which makes it feel difficult to move or walk, etc. It also can affect the sciatic nerve as the nerve is located directly beneath the piriformis, and in some people the sciatic nerve actually bisects the piriformis.
Remember that when a nerve is irritated or compressed, a person can feel pain or have movement affected anywhere along the path of the nerve. In the case of the sciatic nerve, you don't have to have pain radiating down your leg or feel anything in your back to have it hurt just in a specific area....
Did they do a MRI to check on lower lumbar issues?
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SI Joint or Sciatic 
