I recently had otoplasty done. Is this skin necrosis? (Photo)

Thank you for your question. It is very difficult to determine from these photos unfortunately. A hands on examination is necessary to make such a diagnosis. Have you followed up with your treatment provider? You are at a higher risk level for skin necrosis if you smoke and should avoid it as much as possible as smoking complicates nearly any surgical procedure by restricting oxygen flow to healing areas.

It is difficult to tell from your photographs whether you have skin necrosis or not.  You need to follow up with your surgeon to assess the situation.  I would worry about it until the surgeon tells you is okay-it could be a full thickness loss or simply a blister.