Thank you for the question and photos. It is rather difficult to fully assess your situation without an in-person exam. There may be multiple reasons for your pain and redness: seroma (a pocket of fluid under your skin), hematoma (a collection of clotted blood), infection, or post-op swelling. It would be best to visit your board-certified plastic surgeon to fully assess your needs and obtain a reliable medical advice. Best of luck! Dr. Michael Omidi.
It is hard to tell from the pictures what is going on. In complex cases like yours, it would take a complete review of your records and operative reports as well as an in depth physical exam. Your best bet is to return to your surgeon to discuss your concerns. Best of luck!
I suggest going back to your surgeon and discussing all your concerns. An examination could show if you have a seroma or excess fluid in your abdomen which would make it hard and swollen. Also, I am not clear amount your concerns of your right drain. Your photos do not show the drain. Please let your surgeon check you for infection as well.