Is this normal healing? 27 days post tummy tuck. (Photo)

Hello!  Thank you for your question and photos!   It does not appear like an infection at this time, however, you do have areas of full-thickness skin (and possibly fat, necrosis.  This has occurred at the most likely area, at the midline and the convergence of the vertical with the horizontal incisions, which has the most tension and poorest blood supply. Follow-up closely with your surgeon for further wound care instructions and the possible need for debridement of the area. This I'll usually heal without issues and still obtain an excellent appearance of the site.  Best wishes!

This isn't normal healing, but things look like they are getting better.  You have some necrosis of the skin, which can happen after a TT.  Gradually, this will form what looks like a scab and lift off.  You may need a small scar revision in the future.  Please continue to see your surgeon who can make sure things continue to heal.  Best wishes for your recovery!

are very common where you are experiencing your issues.  It is not pus but instead dead tissue.  The yellow will slough (or you can have your surgeon expedite the process by debriding it in the office) and then your body will starting healing the area.  These problems usually have happy endings with reasonable scarring, certainly better than you would have anticipated.