I have been suffering from lower back pain from 5+ years but my issue was not identified until now. Recently I consulted a rheumatologist and understood that the SI joint space is reduced( R> L ) with sclerosis along with ileal aspect of joint. I am under medication but I don't think it's helping me. Is this going to be a permanent problem? Or will the space get normal with any other treatment? I am 28 and my weight is within range, my physical activities walking, yoga were good but now I'm in pain and after few steps of walking I feel tightness around my sacrum and when I try to move around I head mild cracking sounds. Can someone explain me what could this be?