I am NOT affiliated with these websites......I just feel they give good info for my clients needs.
Pain running down the Quads/inside the iliac crest
iliac crest {red lines} https://www.medicalnewstoday.com/articles/319695.php
https://yogainternational.com/article/view/how-to-stretch-and-strengthen-the-psoas
also for sciatic
Pain in the glutes & running down the back of leg/iliotibial band {side of leg}
https://www.emedicinehealth.com/iliotibial_band_syndrome/article_em.htm
https://www.healthline.com/health/back-pain/sciatic-stretches#reclining-pigeon-pose
luv & light
Linda