First...hello to you, glad to have you visiting here. I am SI joint injured and also have some cervical problems. Stair climbing, walking, sitting, even getting up from a chair are very difficult. I have seen some lumbar patients say that they have had SI joint problems after lumbar issues.

Perhaps if you do the search here...SI joint...there is excellent info, very detailed and easy to understand....you may see if these symptoms you are having a relative.....