Why is One Side Hard and the Other Soft After a Tummy Tuck? (photo)

hi i had a tummy tuck a little over 8 weeks ago. The right side is hard and flat and looks great. However, the left side is soft and sags a little bit especially at the incision. I have been told im still swollen on that side and it will harden up like the other side. However i dont believe. Why is one side healing better then the other? can this be fixed with a revision? HELP
