Why don't I have neck/chin definition? (Photo)

Thanks for your question.  Your chin/neck/profile is genetically determined for the most part.  Weight loss and gain can certainly alter the appearance to a certain degree.  For a patient like you in my practice I would recommend placing a chin implant to bring your chin forward and liposuction for the neck.  At your age, a neck lift would not be needed.  Best of luck to you.  

Facial sculpting and contouring can be created with well-placed fillers (Voluma, Countour, Radiesse, Bellafill) and Sculptra, which would give improvement in facial balance. Fat or implants are alternatives. I recommend getting a formal evaluation with a facial sculpting expert. Best, Dr. Emer

One simple answer: genetics. It’s nothing that you are doing; it’s simply what your chromosomes have dictated. That said, there are several different approaches you can take. 1)Do nothing. It might sound strange coming from a plastic surgeon, but you have not asked about having surgery or doing anything to alter your looks! It is crucial to listen to patients, so – unless you wished to change your profile – I would not recommend anything for you. If you wished to change your profile, you could 2)Try an injectable. You could opt for minimally invasive procedures such as Kybella into the submental (neck area under the chin) region to dissolve the fat, as well as a filler such as a Radiesse to add projection to your chin. (The Kybella treatment is permanent but is comprised of a series of injections, usually 3 to 4, spaced about one month apart. The Radiesse is not permanent and usually dissolves after a few years.) 3)Have surgery. With most procedures in plastic surgery, the more invasive a procedure, the more transformative the results. A chin implant and liposuction of the neck would give you permanent results and would address your under-projected chin, and the excess fat of your submental region.

Thank you for adding your photo to your question. It appears that you have two issues: 1. Small chin and 2. Excess fat under your chin.  The traditional treatment option would be laser liposuction and chin enhancement with either chin implant or fat grafting. 

Thanks for sending  in your question.  You would potentially benefit from a chin implant combined with neck liposuction.  This would enhance your neck contour and improve chin projection.  Non surgical options would include Kybella, Coolsculpting and chin filler. 

Chin/neck definition is something that is influenced by genetics, bone structure and soft tissue. Weight loss and gain can change the amount of fat in the surrounding areas and affect the appearance also. Depending on your x-rays, sometimes bone surgery can move around the maxilla or mandible to get an improvement if needed. Surgical options also include chin implants and liposuction for the neck.  
However, in my practice a lot of patients can be treated not surgically with just filler injections like Juvederm. This avoids surgery and usually the patients are very happy. These procedures can be done safely in the office and the results are often very satisfying. An in-office private consultation and examination with a board-certified plastic surgeon would be the best way to fully  address your specific concerns and determine the right treatment plan.
I hope this helps answer your question.  If it does, please take a moment to up vote this answer on the “respond” button on the top right.  

A neck lift is a general term used for rejuvenating the neckline to create a more youthful attractive appearance. Factors which are considered during your consultation to determine if you are a #candidate for #rejuvenating the neck include: •Visibility and amount of excess fat below the chin and along the neckline.•The presence of banding down the front of the #neck.•The amount of #excess skin and condition of your skin.•Chin Deficiency.•Presence of Prominent Digastric Muscles (a.k.a. submandibular gland fullness).
During the examination the chin will be evaluated along with the neck and jawline.  A weak #chin means there is not adequate 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. 

It appears you might have a small (recessed, or weak, as it's called sometimes), and you might also have some submental (under chin) fullness (meaning fatty tissue).  There are good treatments for this, surgical and non-surgical.  Be sure to discuss with your own surgeon about how this applies to you, and whether they have any special concerns in your case.

Because your chin is short, thus do consider advancing the chin forwardly.Being an option, chin implants have serious disadvantages, specially in
the mid and long term, patients are rarely happy with them after 5-6
years, all are out by then or later.Consider the chin advancement by means of sliding genioplasty, the advantages are:-lifetime procedure, no more revision or renewal procedures-more natural than implants-no visibility of implant edges during gestures-improves
the double chin effect at the sub-mental muscles (floor of mouth)
hammock caused by lack of tension there; also improves the shape and
tension of perioral muscles; implants do no offer this feature-horse-shoe enhancement, covering the chin and also the jaw sides of it-no future displacements or neuritis of mental nerves-practically zero infections and 100% healing of bones-no
need for complex plates and screws that may need future removal; just
steel wires synthesis may suffice, they stay buried into bone callusThe cons are:-expensive, but cheap if you consider the lifetime pros-technically
demanding, few surgeons are experienced or comfortable (though I
personally perform 100% of the chin augmentations by this osseous
method, always after offering the patients both options)-scary for the patient (though not so much if you explain well the stuff around it)You'll
find in this website dozens of negative experiences with chin implants
in the short and mid term, do read my profile's Q&A and you'll find
them too. I am doing sliding genioplaties for 15 years with the highest
success and no one patient regreted, totall the opposite, I did many
chin implant removals and one staged sliding genioplasties to replace
them.

Thank you for the question. Others have suggested that this is fat excess. If so, Kybella or liposuction would be great options. However, since you say that this has always been your neck shape, please consider that this may be related to the anatomy of your neck structures. In some patients, the voice box is very anterior -- this leads to a more obtuse neck angle and limits the efficacy of treatments like facelift, neck lift, liposuction, etc. Finally, in your case, it appears that your chin is somewhat small. A chin implant could do a lot to change the angle of the neck.You need to have an in-person examination with a board certified specialist to determine candidacy for procedures. Best of luck moving forward!