Excess fat beneath the chin, known medically as submental fullness, is one of the most common aesthetic concerns in adults. It can appear due to genetics, aging, or weight fluctuations, and it is often resistant to diet and exercise. Fortunately, you do not need surgery to improve your jawline and neck profile. Kybella® is an FDA-approved injectable that destroys fat cells under the chin for permanent results without incisions, stitches, or downtime.

If you are new to Kybella or considering your first treatment, here is everything you need to know about how it works, what to expect, and how the dermatologists at Park Ave. Derm in New York City tailor this treatment for optimal results.

What Is Kybella®?

Kybella is a synthetic version of deoxycholic acid, a naturally occurring molecule in the body that helps break down dietary fat. When injected into targeted pockets of fat beneath the chin, it causes fat cell membranes to rupture. Over the following weeks, the body naturally processes and eliminates these destroyed cells.

The result is a more sculpted, defined appearance to the jawline without the need for liposuction or surgery.

Why Kybella®?

For many patients, reducing submental fat restores facial harmony and creates a more youthful, confident profile.

Key benefits of Kybella include:

• Permanently destroys fat cells under the chin
• Improves jawline definition and neck contour
• No incisions, anesthesia, or sutures
• Minimal downtime
• Customizable to your facial anatomy

At Park Ave. Derm, we also assess whether Botox®, dermal fillers, or other non-surgical facial rejuvenation procedures may complement your Kybella results.

What Happens During a Kybella® Appointment?

Kybella treatment is performed in-office and typically takes less than 30 minutes. Your dermatologist will cleanse and mark the treatment area, then administer multiple small injections using a fine needle. Most patients describe the sensation as mild pinching or stinging, which lasts only a few seconds per injection.

Mild swelling is expected and can last a few days to a week. This is part of the fat cell breakdown and healing process.

How Many Sessions Will You Need?

Kybella is administered as a series of treatments spaced about four to six weeks apart. Most patients need two to four sessions to achieve optimal fat reduction, though this can vary depending on your starting anatomy and goals.

Once the fat cells are gone, they do not regenerate. That means Kybella results are permanent as long as you maintain a stable weight.

When Will You See Results?

Visible improvement typically begins to appear 4–6 weeks after your first session, with full results visible a few weeks after your final treatment. As swelling subsides and fat is naturally cleared by the body, the jawline becomes progressively sharper and more defined.

Who Is a Good Candidate for Kybella?

Kybella is ideal for healthy adults who are bothered by moderate submental fat and prefer a non-surgical approach.

• You may be a good candidate for Kybella if:
• You have persistent fat under the chin that does not respond to diet or exercise
• You are seeking a minimally invasive option for contouring the lower face
• You have clinical evidence of cosmetic concern in the submental region

During your consultation, one of our board-certified dermatologists will assess your facial anatomy and determine whether Kybella or another treatment is the most effective approach.

Does Kybella® Hurt?

The procedure itself is generally well tolerated. A topical numbing agent may be applied beforehand for comfort. Post-treatment swelling, tenderness, and firmness under the chin are normal and temporary. Most patients return to work or social activities within a few days.

Can Kybella® Be Combined with Other Treatments?

Absolutely. Many patients choose to combine Kybella with Botox®, dermal fillers, or skin tightening procedures like ResurFX® to enhance facial contours and create a more cohesive, youthful appearance. The dermatologists at Park Ave. Derm will help you build a treatment plan tailored to your features.

Is Kybella permanent?
Yes. Once fat cells are destroyed, they do not come back. However, weight gain can affect your long-term results.

What are the side effects?
Swelling, bruising, tenderness, and firmness under the chin are common and typically resolve within a few days.

Can Kybella treat jowls or other body areas?
Kybella is currently FDA-approved only for treating submental fat. Other injectable options may be better suited for other areas.

Final Thoughts: Is Kybella Worth It?

If you are tired of trying to “pose around” your double chin or feel that submental fullness is aging your profile, Kybella may be the right treatment for you. It is the only injectable treatment that permanently eliminates fat cells under the chin—no downtime, no scars, and no surgery.

Schedule Your Kybella Consultation at Park Ave. Derm

If you would like to schedule your Kybella treatment, please fill out our contact form or call us at (212) 752-3692. We will do our very best to provide you with an appointment in a timely manner.