Is this necrosis, stitch abscess, or wound dehiscence? (photos)

It appears that you are having some delayed wound healing issues.  Many things can contribute to it - reaction to the sutures, rubbing or irritation, smoking history, to tight a closure, etc.  I would recommend bacitracin or neosporin twice a day's end keep them clean with regular washing.  They usually heal on their own with proper wound care, but if you start to experience any drainage, call your surgeon at once.  I hope this helps.

It looks like you have a small rim of marginal necrosis of the skin. This area of skin will eventually slough off and heal in from the sides. In the meanwhile, be vigilant in the care of these incisions as instructed by your surgeon so you do not develop problems. It is critical to avoid any trauma to the area as it heals.

Thans for your question and photos.  From what I can see on your photos, you appear to have some slow healing along the incision.  It appears to be superficia, but without an in-person exam, it is difficult to say for sure.  Best to follow your surgeon's advice.  Good luck. 

You have a small superficial looking wound along the incision line in these pictures (this does not substitute for an in person physical exam).  This does not look like a stitch abscess.  It could have been due to a small amount of marginal skin necrosis or superficial wound dehiscence.  This will likely heal on its own with wound care, you will need to listen carefully to and be followed closely by your plastic surgeon to ensure that there is not disruption of deeper layers.

Based on your photos you appear to have small areas of skin necrosis around the incision. Ask your plastic surgeon about wet to dry dressings to remove or debride the white tissue. Incisions heal best when open areas are pink to red. You should follow closely with your surgeon. Ointments may be macerating the tissue.

The picture you submitted does not look worrisome, but it is not possible to make an accurate diagnosis online.  In general, minor incision problems will look worse before they look better, but usually will improve with time and local wound care like you are doing.  This does not look like necrosis or stitch abscess.  You could develop a wound dehiscence, but the chances of this happening decrease as more time passes.Keep in close contact with your plastic surgeon and try not to worry.  As long as you are not feeling worse or having pain or fever, you should be okay.  Best wishes.