Do I need a neck lift revision? (Photo)

Thank you for the questions and the photos. There are limitations to the utility of neck lifting without skin excision. Tightening the muscles under the chin and removing a little fat can be a great treatment. However, if there is excess skin, and this loose skin is still there afterward, you can have a recurrence of sagging. This is a difficult problem in younger patients, because you aren't really ready yet for a lower facelift... but have some extra skin. One solution is to do a small submental skin excision. With a well-executed closure, this can hide quite nicely. Another option is to use a minimally-invasive tightening device. In my practice, I use the ThermiTight treatment for patients such as yourself. Take care and best of luck!

It's best to begin by consulting with a surgeon in-person. The presence of banding down the front of the #neck, and, amount of excess skin and condition of your skin are among some factors which determine what treatments will best rejuvenate your neck . 
During your initial examination, your chin will be evaluated along with the neck and jawline. A weak #chin implies a lack of chin support for the skin along the neck line. In younger individuals a chin implant alone is usually all that is needed to improve the appearance of the neck. Subsequently, it will also improve the overall #balance of the face and can create the illusion of a smaller nose. As a stand-alone procedure, chin augmentation can be performed in the office under local #anesthesia. For individuals with signs of #aging in the neck, a chin implant added to one of the recommended procedures above, will provide optimal results.
If you are not a candidate at the time of your #consultation, your board certified plastic surgeon can recommend non-surgical alternatives to address your concern. Consulting with a board-certified plastic surgeon who specializes in #neck lift procedures is important to ensure you are receiving the best advice, care, and surgical experience possible.

If you had a corsette platysmaplasty, either the suture loosened or it was not carried inferiorly as far as you expected. I would approach this by doing another platysmaplasty and a full facelift to get better definition along the mandible. A non surgical option would not be sufficient.

When you say a necklift (with lipo) and corset platysmaplasty, do you mean a "corset platysmaplasty neck lift"(incision under chin) or a neck lift(incisions around earlobe and in back of ear)as well as a corset submental muscle tightening? From the pictures it appears to be the former. Your platysma muscle appears to have residual laxity; perhaps there is lateral laxity(as opposed to purely submental laxity)? Your failed attempt to tighten the skin and weaken the muscle appear to confirm this observation.If not already performed, a formal neck lift(ear incisions) should remedy the situation.Hope this helps.

I believe you would benefit from a revision.  Things are unlikely to improve if a year has elapsed.  Discuss with your surgeon.  Good luck.  Donald R Nunn MD   Atlanta Plastic Surgeon