Guaze or tegaderm on incision area?

Thank you for sharing your question.  If you are having drainage from your incision sites I would recommend applying gauze with a small amount of non-antibiotic ointment, such as Aquaphor.  Best to always seek out your surgeon's advice as they know the full details of your procedure.  

I would suggest that you communicate your questions/concerns directly by your plastic surgeon for specific/relevant advice. Until you are able to do so, I would suggest that you utilize a nonstick dressing such as Adaptec or xeroform, covered by a sterile dressing. Best wishes for an outcome that you will be very pleased with.

Now that your tegaderm has fallen off, I would use gauze, or telfa pad. Either is probably fine, and other options are also available. Its most important to keep the wound clean and dry. The slight open area sounds normal - its unlikely to not be sewn together so much as the wound edges may have opened from a loosened suture. The burning is also consistent with a recent surgical procedure. Best of luck on your recovery. Always consult with your operating surgeon if things change.