A course is usually 2–4 sessions spaced 6–8 weeks apart, noticeable swelling for several days is expected, and a physician assessment decides whether fat — rather than loose skin — is the main concern.

Let's talk about the double chin — that stubborn pocket of submental fat that doesn't care how much you diet, how hard you work out, or how carefully you angle your selfies. If you've been trying to wish away your double chin and it's not cooperating, you're not alone. Submental fullness is a common aesthetic concern, and it affects people of all ages, weights, and body types.

The good news? Here's your complete guide.

When injected into the submental fat pad (the area under your chin), deoxycholic acid does exactly what it does in your gut: it disrupts and destroys fat cell membranes.

Here's the critical detail: once destroyed, those fat cells cannot regenerate. Your body processes the destroyed fat cells through its natural lymphatic and metabolic systems over several weeks. The result is a lasting reduction in submental fat — provided you maintain a stable weight.

How Deoxycholic Acid Works

2. Cell membrane disruption: The acid breaks down the membranes of fat cells (adipocytes) on contact
3. Cell death (adipocytolysis): Fat cells are destroyed
4. Inflammatory response: Your body mounts a controlled inflammatory response to clear the debris
5. Macrophage activity: Immune cells called macrophages engulf and process the destroyed fat cells
6. Natural elimination: The fat is metabolized through your lymphatic system over 4-6 weeks
7. Collagen formation: The healing process stimulates some degree of collagen production, providing mild skin tightening

How Do Double-Chin Injections Compare With CoolSculpting?

Double-chin injections dissolve fat chemically with precise placement but more swelling and usually more sessions, while CoolSculpting freezes fat with an applicator, causing less swelling but less precision. Here is the breakdown:

When Are Double-Chin Injections Considered Over CoolSculpting?

• Precision is needed: The injection can be placed exactly where the fat is — every session is customized to your anatomy
• Smaller fat deposits: For relatively small submental fullness, this treatment allows precise placement
• Skin tightening is desired: The inflammatory response stimulates some collagen production, which can improve skin quality
• You prefer shorter treatment sessions: 15-20 minutes vs. 45-60 minutes

When Is CoolSculpting Considered Instead?

• You prefer less swelling: CoolSculpting typically causes less dramatic swelling
• Larger fat deposits: The applicator can address a broader area per session
• You want fewer sessions: Some clients achieve their goal in 1-2 CoolSculpting sessions
• Needle anxiety: CoolSculpting is entirely non-invasive

A physician assessment of your anatomy and goals decides which option, if any, is suitable.

Who Are Double-Chin Injections For?

They are generally discussed for adults whose double chin is mainly fat rather than loose skin and whose skin has reasonable elasticity; a physician assessment decides suitability.

Who Is Typically Assessed for This Treatment

• Adults with moderate submental fullness ("double chin") that persists despite diet and exercise
• People with good skin elasticity — the skin needs to contract after fat removal
• Those who want a lasting change without surgery
• Clients in their 20s-50s with realistic expectations
• Anyone who wants a more defined chin-to-neck angle and jawline

When Other Options Are Discussed

• Significant skin laxity under the chin: If your concern is primarily loose skin (not fat), this treatment won't address it. Treatments like Ultherapy or surgical options may be discussed instead.
• Very large fat deposits: For significant submental fat, liposuction may deliver more dramatic results in a single procedure.
• Active infections in the treatment area
• Pregnancy or breastfeeding
• Previous surgery or scarring in the submental area (may affect results)

Candidacy is assessed during consultation — some people are suited to double-chin injections alone, others to a combination approach, and some to neither.

What Happens During a Double-Chin Injection Appointment?

An appointment involves an assessment and marking of injection points, numbing, about 15–20 minutes of small injections under the chin, and then expected swelling, numbness and firmness for the following days.

Step 1: Consultation and Marking

Your consultation begins with a detailed assessment of your submental area — we evaluate the amount of fat, the quality and elasticity of your skin, your jawline anatomy, and your aesthetic goals. We then create a customized treatment grid by marking injection points under your chin, spaced approximately 1cm apart.

Step 2: Comfort Preparation

We apply topical numbing cream and/or ice to minimize discomfort. Some clients also receive a local anesthetic injection for additional comfort.

Step 3: Injection

Using a fine needle, we inject small amounts of the solution at each marked point.

What does it feel like? A stinging or burning sensation is common during injection and usually lasts a few minutes as the solution begins working. Numbing cream and ice are used to manage the discomfort.

Step 4: Immediate Post-Treatment

After treatment, you'll notice:

• Swelling: This is expected and significant — it's actually a sign that the treatment is working (inflammatory response destroying fat cells)
• Numbness: The treatment area may feel numb for several days to weeks
• Firmness: The area under your chin will feel firm as the body processes destroyed fat cells

The Swelling: Let's Be Real

This is where honesty matters. Swelling after this treatment is the most significant side effect and the main reason some clients hesitate. Here's the timeline:

Planning tip: Schedule your treatment when you can afford 3-5 days of social downtime. Work from home if possible for the first few days.

How Many Sessions Do You Need?

Most clients need 2-4 sessions, spaced 6-8 weeks apart. Some people with minimal submental fat may see the change they want after 2 sessions, while those with more fullness may need up to 6 sessions (the typical clinical maximum).

What Determines the Number of Sessions?

• Amount of submental fat: More fat = more sessions
• Desired result: Subtle improvement vs. dramatic contouring
• Individual response: Some people respond more aggressively to deoxycholic acid
• Skin quality: Better elasticity means better final contour

What Results Can You Expect After Each Session?

Change is gradual: a subtle reduction after the first session once swelling settles, a more noticeable reduction after two or three, and a more defined chin-to-neck angle by the end of the course, provided weight stays stable.

After Session 1

• Once swelling resolves (4-6 weeks), you'll notice a subtle reduction in submental fullness
• The chin-to-neck angle begins to improve
• Results may seem modest — this is normal; each session builds on the last

After Session 2-3

• Noticeable reduction in double chin
• Jawline becomes more defined
• Profile views show clear improvement
• Skin in the area may appear slightly tighter

After Session 3-4 (Final Results)

• Significant, lasting reduction in submental fat
• Well-defined chin-to-neck angle
• Improved jawline definition
• The treated fat cells are destroyed and do not regenerate; remaining fat can still respond to weight change

Long-Term

• Maintain a stable weight to preserve results
• The destroyed fat cells do not regenerate
• Maintenance treatments are not usually planned
• Some people return after 2-3 years for a touch-up if minor fullness returns with weight fluctuation

Can Double-Chin Injections Be Combined With Other Treatments?

Yes — they are sometimes combined with skin tightening, jawline fillers or masseter treatment when a concern involves more than fat, and a physician assessment decides whether a combination is suitable.

Double-Chin Injections + Ultherapy

When both submental fat AND skin laxity are present, double-chin injections to reduce the fat can be followed by Ultherapy to tighten the overlying skin. This combination creates a comprehensive non-surgical chin and neck rejuvenation.

Double-Chin Injections + Jawline Contouring (Dermal Fillers or Radiesse)

After fat reduction, jawline contouring with fillers or Radiesse can further define the jawline for a sculpted, contoured lower face.

Double-Chin Injections + Neuromodulator (Masseter Slimming)

For comprehensive lower face contouring, double-chin injections can be combined with neuromodulator masseter slimming (jaw width) and possibly fillers for a more defined lower-face contour.

How Safe Are Double-Chin Injections?

The treatment has a well-documented safety profile: temporary swelling, bruising, numbness and firmness are common, while nerve irritation affecting the smile or temporary difficulty swallowing are rare.

• Physician-administered, specifically for submental fat reduction

• Most common side effects: Swelling, bruising, numbness, firmness, redness at injection sites — all temporary

• Rare side effects: Nerve injury causing asymmetric smile (temporary, resolves in weeks to months), difficulty swallowing (temporary)

• Serious complications: Extremely rare when performed by trained medical professionals

At Skin Art MD, treatment sessions are performed by medical professionals trained in submental anatomy, including the marginal mandibular nerve and other critical structures.

What Else Do People Ask About Double-Chin Injections?

Common questions cover discomfort, how long results last, loose skin, the number of sessions, exercise, visible swelling, cost and how the treatment compares with liposuction.

Q: How painful is this treatment? A: The injection process involves a stinging/burning sensation that lasts about 2-5 minutes. We use numbing cream and ice to manage discomfort, and the sensation usually eases within minutes.

Q: How long do results last? A: The destroyed fat cells do not regenerate. However, remaining fat cells can still enlarge with significant weight gain, so maintaining a stable weight is important.

Q: Can this treatment tighten loose skin? A: The inflammatory response does stimulate some collagen production, which can provide mild skin tightening. However, if loose skin is your primary concern, treatments like Ultherapy are more appropriate.

Q: Is one session enough? A: Usually not. A typical course is 2-4 sessions, although some people with minimal fat are satisfied after 2 sessions.

Q: Can I exercise after treatment? A: We recommend avoiding vigorous exercise for 48-72 hours. Light walking is fine immediately.

Q: Will people notice the swelling? A: Yes — peak swelling lasts 3-5 days and is quite noticeable. Plan your schedule accordingly — for example, before a weekend or a work-from-home period.

Q: How much does this treatment cost? A: Cost depends on the number of vials and sessions in the plan set at your assessment; contact us for current pricing.

Q: Double-chin injections vs. liposuction — which is better? A: They suit different situations. Double-chin injections are used for moderate submental fat without surgery, with swelling for several days. Liposuction is used for larger fat deposits in a single procedure but requires surgical recovery. A physician assessment decides which, if either, is suitable.

You can book a consultation at Skin Art MD at Metrotown, Burnaby. The visit assesses your submental anatomy and skin quality, and a physician assessment decides whether double-chin injections, another option or no treatment is suitable.

Skin Art MD at Metrotown — Modern aesthetic medicine in Burnaby, BC. Serving Burnaby, Vancouver, New Westminster, Coquitlam, and Metro Vancouver.