Why is around my incision hard and swollen?

From your description, it appears you have a long tummy tuck scar with two dog ears on the ends. Swelling is very common after this procedure and it is normal to feel like there is a "roll" or hardness all along the length of the incision. Dog ears represent areas of extra skin and many times, these will flatten out in due time. If not, your plastic surgeon can revise these, typically as a minor office procedure. Wait a good 6-9 months to see your final result after the swelling has disappeared...Good luck with your recovery!!

A typical abdominoplasty is a powerful procedure that
often removes and reposition tissue of the abdominal wall for better contour
and aesthetics. After an abdominoplasty, the skin swells from the trauma of
surgery as fluid collects and the tissues become edematous. This can often lead
to small contour irregularities in the early post-operative period. These
irregularities often settle out as the swelling resolves and the tissues
soften. It will take 3 to 6 months to see a final result. Close follow-up with
the surgeon is essential.