What are the best stretches to loosen tight IT bands?
Tightness of the IT band causes femoral internal rotation and tight peroneal also causes tightness of the IT band. A dynamic foot assessment single leg stance to assess hip musculature can give clarity as to why IT is tight. Stretching with MCT foam roller would help.
strengthening the hips abductors and stretching the peroneal muscles will help avoid future issues.
I agree with all the suggestions and stretches given above. Just thought of adding some relevant issues associated with IT band. This type of tightness usually happens unilaterally.