Scar tissue preventing normal motion of tissues is seldom considered as a cause of pain.
This can be difficult to diagnose clinically. On imaging this can be an easy diagnosis or can be extremely subtle. If correctly diagnosed this can potentially be successfully treated.
There are certain sites where entrapment is more likely and should be considered when a patient presents with pain in these areas.
A typical location is the adherence of the Achilles tendon to the underlying fat space. A potential treatment for this condition is ultrasound guided hydrodissection. Ultrasound is used to visualize the region of scarring and adherence and via injection of fluid the area of adherence is mechanically freed.
This is a minimally invasive technique that is surprisingly well tolerated with minimal discomfort.