because AS didn't target my spine or SI's originally

That was a typo whistle

My arthritis struck may ankles first, then my knees, and at the time, everything else was unaffected. Seven years later my hips started giving problems, and then later my spine started to give problems too.

HLA-B27+, JRA diagnosis in 1981, re-diagnosed as AS in 1988. Also iritis, colitis, and psoriasis. NSD + low carb helps me. My health makes it hard for me to post in a timely way.