Cobra neck fix? Will I need to undergo a full revision? (Photo)

I am sorry you have had a less then optimal result, that is very stressful. It is difficult to determine the problem without seeing your preoperative photos and operative report. It looks like subplatysmal (deep) fat was removed, which is an important part of a deep neck lift. However, it also looks like the submandimbular glands and digastric muscles were not correctly contoured and that the platysmaplasty sutures failed. Get a second opinion from an experienced facial surgeon and bring your preoperative photos and operative report. Best of luck and stay optimistic.

For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in-person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest reaching out to an expert for a consultation with surgical and non-surgical methods to get a comprehensive option. Best, Dr. Emer.

This type of deformity would require revision using existing scar. That involves rearrangement of tissues to fill the gap, possibly fat grafting. Good luck.