From Wikipedia :
http://en.wikipedia.org/wiki/Trigger_point:
Trigger points or trigger sites are described as hyperirritable spots in skeletal muscle that are associated with palpable nodules in taut bands of muscle fibers. [1] Trigger point practitioners believe that palpable nodules are small contraction knots[ambiguous] and a common cause of pain.
The description of your scar tissue as rough or bumpy may be similar to my "crunchy" area. If it is scar tissue, I guess I don't understand exactly how it forms.
