Would love an update on how you are doing, and others too. I just found this group with an IFI search, as I have bilateral IFI (7mm on each side) (apparently congenital in my case). I’m 45- female. 2017 was symptomatic and debilitating on right side - and low back - took steroids and it resolved, and now on left, and this time not improving at all - excruciating at times. I was only running 1-2 miles per day in December, then had the flu and in bed off and on for two weeks, before this acute on chronic onset which has lasted two months. I’m a runner and biker (but no marathons or triathlons yet - always wanted to, but health issues - possibly lifelong IFI), Phd, neuroscientist, but partner is a pain med doc, and we only came to the realization of IFI two weeks ago, after a pelvic MRI. I’ve read most of the current scientific literature on IFI, and am now in touch with a leading MD/researcher, who does the “Cutting Block Technique” which is an arthroscopic method for shaving down the lesser trochanter, without releasing the iliopsoas tendon (which I too think is worrisome, and would want to avoid if possible). I have physical therapist who has very little experience with this. I was working with him on core strengthening for back pain the month before this past onset, and we wonder if the piriformis stretch actually enhanced the IFI (quadratus femoris impingment). So, I now have to stop myself from doing the piriformis stretch at my desk and on my train commute…which was a regular behavior for me - to help me deal with low back pain. What I am now wondering is what stretches are we suppose to avoid? I saw this mentioned in a paper, but not detailed. Any advice appreciated! And happy to share literature for anyone interested. Here’s the paper on the cutting block technique (won’t let me upload because too large).