I tore my ACL and miniscis in July 2015. I had surgery at the end of July to repair them Then in August I had surgery to remove scar tissue The scar tissue has come back forming a knot which is painful and limits my mobility what should I do?

Where is. the "scarring" you mention..in the joint??(Arthrofibrosis) or around the joint???? ( "keloid" ) In any case if there is a "knot" possibly a steroid injection will help...or surgical excision is needed! Your Orthopedist is the person you should be in contact with! Hope this helps! Dr Z.