Botox Not Working? When to Judge Brow vs. Jaw

Botox for frown lines and forehead lines usually starts to kick in around day 2 to 4 and reaches its strongest effect around day 10. Jaw Botox works on a different clock: your bite feels weaker first, while your jawline starts to slim from about week 2 and changes most around month 3. That's why "it isn't working" means something different on day 5 than it does on day 14 or at one month.

How Long Does Botox Take to Kick In?

How Long Does Botox Take to Kick In?

The answer depends on what result you're looking for. Between the brows and on the forehead, the result is simply a muscle that moves less, so you can see it in the mirror within days. On the jaw, the goal is a slimmer face, and that only happens after the chewing muscle has been resting long enough to shrink. That takes weeks, even after the muscle itself has lost strength.

How Long Does Botox Take to Kick In?

Botox blocks the signal a nerve sends to tell a muscle to contract. Muscle weakness typically shows up within 2 to 4 days, and the effect peaks around day 10. After about 3 months, the nerve and muscle reconnect, and movement gradually returns. How fast you notice it can differ from person to person.

Frown Lines and Forehead Botox: When Is It Too Early to Judge?

Frown Lines and Forehead Botox: When Is It Too Early to Judge?

Give it 2 weeks. Since the effect peaks around day 10, still being able to frown on day 3 to 5 doesn't mean your Botox failed.

In a study of 45 women getting Botox for frown lines for the first time, doctors saw the effect begin in everyone by day 4. By day 3, it was 91% by the doctors' assessment and 93% by the women's own reports. Another trial compared three toxin brands in 180 people. For women, the average start day ranged from 3.0 to 5.3 days depending on the product, and men started later with every brand. A later start didn't mean the result wore off sooner.

If you frown as hard as you can at 2 weeks and the lines still crease just as deeply as before, that's the time to contact the clinic that treated you. Check for one side moving more than the other, or a brow tail that kicks upward, on the same day.

Jaw Botox: Why Your Face Shape Lags Behind

Jaw Botox: Why Your Face Shape Lags Behind

A jawline that looks the same at 2 weeks is a normal part of the timeline. Make your first call at one month, and judge the final change around month 3.

In a one-year study of 10 women treated for a wide jaw, bite strength dropped from the first day. Visible change began as early as 2 weeks, peaked at month 3, and the face shape gradually returned by about 6 months. Bite strength started recovering in week 3 and was back to normal at 3 months.

Jaw Botox: Why Your Face Shape Lags Behind

So if chewing felt a little weaker in the first days, the toxin reached the muscle. The slimmer outline comes later. Take a one-month photo at the same angle as your "before" photo and compare the two side by side. Results differ from person to person, especially with a thick, strong jaw muscle.

Botox Not Working After 2 Weeks? What Gets Checked First

Botox Not Working After 2 Weeks? What Gets Checked First

If nothing has changed by the right check date, the first questions are whether the dose was enough for your muscle strength and whether the injection points matched the muscle. Even in a study of 45 people treated for a wide jaw, 5 reported no change or weren't satisfied during 4 to 10 months of follow-up. With the same dose, a thicker, stronger muscle may relax less.

If you've had Botox often, your body may also have made antibodies that weaken the effect. The main risk factor is how often you get injected, which is why repeat treatments generally shouldn't be closer than 8 to 12 weeks apart.

Getting a quick redo somewhere else because it "didn't work" shortens that gap. It's safer to go back to the clinic that treated you first, confirm the date, product name, and dose for each area, and then decide what comes next.

Side Effects That Shouldn't Wait for Day 14

Side Effects That Shouldn't Wait for Day 14

Swelling, redness, soreness, or a small bruise at the injection points, and a mild headache, are expected reactions that pass. After jaw Botox, chewing can feel tiring and the injected area may ache, and that can last 1 to 4 weeks.

Contact the clinic that treated you without waiting for your check date if you notice:

• A drooping eyelid or brow that makes your eyes feel heavy
• Weakness spreading to nearby muscles, so your expressions look unusual
• Chewing or speech discomfort that isn't easing 4 weeks after jaw Botox

A droopy eyelid happens in fewer than 1 in 10 treatments and can last up to 12 weeks. Trouble swallowing, speaking, or breathing is very rare, but it can mean the toxin has spread, so go to the nearest emergency room right away*.

Based on American Academy of Dermatology patient guidance.

Planning Around a Trip to Seoul

Flying isn't a reason to postpone Botox, unless you had sedation that day. Most changes build gradually rather than all at once, and with jaw Botox the main change arrives weeks after you've flown home.

That makes your check dates easy to plan from home. Take your 2-week frown photo or your 1-month jaw photo where you are, then send it with your questions to the clinic through WhatsApp. If you notice eyelid drooping that bothers your vision, or any trouble swallowing, speaking, or breathing, see a local doctor or go to a hospital first instead of waiting for a reply.

What to Bring to Your Follow-Up

For frown and forehead lines, bring a photo of you frowning hard at 2 weeks. For the jaw, bring a "before" photo and a 1-month photo taken from the same angle. Photos from the right check date are what separate "it didn't work" from "it hasn't shown up yet."

At your follow-up, start by asking, "How did this dose compare with how thick my muscle is?" That one answer makes the next plan easier to set. STON Clinic is in Myeongdong, inside Lotte Hotel Seoul near Euljiro 1-ga Station. When you message us, include your treatment date, the areas treated, and the photos from your check date.