I have had ITBS issues while hiking. For me, the things that helped me were specific stretches, using my poles to massage the IT band and this band that a lot of runners use for ITBS issues: https://www.amazon.com/gp/product/B000G34VV0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I have never had issues since I started these and I always use trekking poles. I would fall once every 50 miles if I didn't have poles :-D