Chin liposuction and going in behind the ear. Is it safe?

This area can have persistent fat  and platysmal bands in even very thin patients. So it is all about having fat in the right places. Sometimes we even move this fat to another area to help define the jawline. Approaching the jaw line from behind the ear is safe if the surgeon does this case frequently. Also must of us that do this procedure also do larger cases involving areas of the face so we know the anatomy and are comfortable approach the face from different areas. These fat pockets can be tricky and often times a dual approach is helpful. Not always though so we would need to do a good physical exam first. What we do is remove that layer of fat beneath the skin and allow the skin to fibrose to the muscle of the neck. The muscles of the neck and tongue in conjunction with the only free floating bone in the body (the hyoid bone) are the limitations of what you are trying to obtain. After palpating that bone and those muscles you could get a better idea of what can be obtained.
Hope this helps.
Best of luck,
DrC

safety of any procedure is dependent on skill and experience of the doctor performing the procedure.   There are lots of different doctors with different credentials and expertise with variable years of experience.  Not all doctors have same level of aesthetic sense nor surgical artistic hands.  

If you have good skin tone and the fat is not excessive, liposuction can be done in the office under local anesthesia going through a small 1/8 of an inch opening under the chin. Depending on the patient and in order to do it in a crisscross fashion and get smoother results, two more incisions are made behind the earlobes. If there is a lot of excessive skin, some skin would need to be removed placing the scar behind the ear. As far as safety is concerned, in expert hands, all these facial procedures are safe. I have been doing liposuction, facelifts, brow lifts, and eyelid surgery for over thirty years and never had a nerve injury. Complications can happen after any surgery and you are normally given a consent form listing all of them, but the expertise of the surgeon is your best insurance against complications. 

Liposuction done by an experienced facial plastic surgeon is extremely safe. Depending on your situation liposuction may be performed with one small incision under the chin or there may be addition small incisions behind the earlobes. Nerve damage is always a risk with all surgeries, but is very rare and is unlikely in the hands of an experienced surgeon.

Fatty deposits in the neck are located at the angle of the jaw underneath both ears, and the central part of the chin. To adequately remove fatty deposits in the neck, access incisions for the liposuction cannula are usually performed behind each ear and underneath the chin. For many examples, please see the link and the video below

 Hi, I have performed many facial shaping procedures using dermal fillers, facial implants (cheek, chin), liposuction and/or facelifts for over 30 years.  Non smiling photos of your face from the front and side would help in the evaluation. If your chin is "not" weak and there is excess fat but no excess skin under the chin, submental (below the chin) liposuction is the most effective method of removing excess fat.  This is performed through a small, needle nick in the the skin under the chin.  If there is excess skin under the chin this can be removed using a small, curved incision under the chin.  The liposuction can then, as you mentioned, be performed through the same incision.  I have performed many facial shaping procedures, including Chin Augmentation with dermal fillers or silastic chin implants, for over 30 years.  Should the chin be weak, this creates an imbalance making the nose appear larger, the mid face top heavy, the lower face looks short, de-emphasizes the lips and allows early formation of a "double chin".  
 Proper placement of a silastic chin implant adds forward projection to the chin thereby creating harmony and balance to the lower face.  Using the same incision, liposuction can be performed to reduce the fat and further shape the neck.  Excess skin, from below the chin, can also be removed through the same incision.  
 I have found that placement of a silastic chin implant, through a small curved incision under the chin (also allows excess skin removal) to be very safe, quick, highly effective and far less invasive than a sliding genioplasty (requires extensive tissue dissection, bone cuts and placement of metal screws and plates to secure the cut segments of bone).  I perform chin implant surgery in 30 minutes or less, often using a local anesthetic alone.  In my opinion, you are a good candidate for chin implant surgery.  
 A small needle nick nick in the skin behind each ear is used to perform liposuction under the jaw line and across the neck if excess fat exists in that area.  However, this approach is far less effective at removing fat under the chin in my humble opinion.  Hope this helps.