Really after a week the risk of infection's down to zero unless you open the area back up, which would take some doing. Two trains of thought regarding how to approach a scar. Some would massage vigorously to try to break down the collagen in a favorable way. Others would let nature take its course then revise the scar (via plastic surgery) if the end result is suboptimal. I'm a "let nature take its course" kind of guy, but that's really only opinion, with no hard data to back it up.