Scar tissue at bottom of pec muscle. Is there a fix?

I had my implants in 2010, removal in 2016. The impants 350cc were intact, capsule was very thin so it was left and pec muscle was not reattached where original surgeon cut it (ugh). I have had severe muscular upper back pain since the day I got the implants. Have began power sculpt gym class, back paij is worse again. I noticed my scar tissue under breast is thick again. Upon massaging it agressively, my back loosens up. What couuld be happening here? Is my pec damaged or stuck? Is there a fix?