What is this white thing on my tummy tuck incision? (Photo)

Hello!  Your area of concern appears to be a small, superficial wound. It is ozzing likely from the wound and according dehiscence of the area there. No signs of infection are seen on your photos, but any wound may become infected. So, just continue your follow up with your surgeon and continue local wound care to the area as directed by him/her. I suspect that this will heal without anything further needed. Hope that this helps!  Best wishes!

appears to have fallen or been washed off and if so,  you appear to have a superficial wound that will heal with standard wound care.  If you have a whitish thing that cannot be simply pulled off, you should see your surgeon for an evaluation and further management.  The white thing could be necrotic skin, exudate, a protruding suture, or something else but none are serious.