How deep should my doctor be injecting Kybella?

Kybella is a non-surgical option for your neck. It is an injection that has been approved by the FDA to help improve the appearance of fullness associated with the submental (neck) fat in adults. It is also used off label in other areas and is used medically to treat lipomatosis. Unlike fillers or Botox, it works by dissolving the fat it comes in contact with. 
During a Kybella treatment, the neck is first cleaned and numbed with topical lidocaine or ice. A pattern is drawn on the neck and the product is injected into the fat under the skin and above the platysma muscle - usually at a depth of around 1/2 inch. The amount injected depends on the amount of fat to be dissolved. The body then absorbs the fat over several weeks.

There is swelling, bruising, and some numbness in the area during this time. The injections are usually done once a month and it usually takes 2 to 4 treatments to reach full effect depending on the severity of the fat.

See the link below for more information. 
Effective surgical alternatives for submental fat removal include liposuction and direct excision.

A detailed examination will help delineate the best option. Consultation with a surgeon certified by the American Board of Plastic Surgery would be the next best step.

The needle for Kybella only goes about 1cm into the skin so the injections are shallow. The number of injections will depend on how much fat needs to be removed. Make certain to schedule your treatment with a board certified plastic surgeon who has experience with Kybella and all should be fine. 

 Kybella is injected and FDA approved only for submental fat therefore it is injected in the under the chin area. The injection depth is half a needle and it travels only 1cm from the injection site, so the risk for any damage is minimal. The amount injected varies by the amount of submental fat. I always prefer to inject smaller doses and then have 2 or 3 treatments. It all depends how much fat you have. You may need more treatments than that. It is hard to tell without a photo. Make sure to choose experienced provide for best results. Good luck!