I have continued numbness 2 weeks after injections. Is this common?

Kybella, the first FDA-approved injectable treatment to reduce "double chin," is a very effective non-invasive procedure, but does have several temporary side effects that are important to be aware of.  While stinging only lasts for about 15 minutes following Kybella injection, there are several other temporary post-treatment effects to consider.  The most common side effect is swelling, which usually lasts several days but can last up to one full month.  Most of my patients also report a feeling of "jiggling" when they walk for several days after treatment.  Numbness and tingling are also very common and can last up to one month.  In the original Kybella studies, subjects were re-treated with Kybella every 4 weeks (anywhere from 3-6 injection treatments were performed), but in clinical practice, most doctors are waiting 6-8 weeks in between treatments, until most side effects have resolved before reinjection.  Waiting 6-8 weeks is a benefit for another reason as well: you may see continued improvement for up to 8 weeks following Kybella treatment.  As a Kybella injection trainer, I advise injectors to let patients know that when Kybella treatments are performed on a Thursday, patients will be ready to return to work and social commitments the following Tuesday, as a rule of thumb.

Yes. What you are experiencing is normal. Every patient heals at his or her own rate, but it can take many longer than two weeks to completely heal. The numbness will dissipate as the swelling subsides. 

Bruising, redness, swelling, firmness, and numbness may occur and can take approximately 4 weeks to resolve. We typically advise patients to avoid blood thinners a week prior to injection to minimize risks of bruising. We also recommend patients sleep with the head elevated, limit salt intake, and ice for the first 48 hours to minimize swelling.