When I was studying musculoskeletal rehab, we learnt about compartment syndrome, but our lecturer had a nack for telling us everything about the condition EXCEPT what to do about it - he left that up to us to figure out on our own.
Now, I would straight up recommend consulting with a physiotherapist and seeing what they have to say about it. My suspicion is that use of foam rollers and other massage/flexibility/release techniques my help the situation, just as foam rollers are often used to release the tightness of the ITB on the outer thigh. But I can't vouch for any guarantees of success here, I can only cite what is reported as happening with the same treatment on other tight fascia, such as the ITB.
Ryan - D.Fitness. SQ 2x150kg - BP 95kg - DL 190kg - OHP 60kg