When Does Botox Start Working?
Here's exactly when Botox results appear and how long they last — backed by clinical research.
After your first Botox procedure, it's completely normal to keep checking the mirror, wondering, "When will I see results? Shouldn't it be working by now?" If nothing looks different the next day, you might start worrying something went wrong. So — when does Botox actually start working?
The short answer: Botox doesn't take effect immediately after injection. Results typically appear gradually over the course of a few days. Clinical data suggests changes begin to show around days 2–3, with noticeable improvement within the first week. That said, both the speed of onset and how long results last can vary from person to person — so knowing the timeline and being patient makes all the difference.
In this article, you'll learn:
· How Botox works
· When results typically begin to appear
· How long results tend to last
· What to keep in mind before your procedureHow Does Botox Work?
Botox is a procedure that reduces the excessive movement of facial expression muscles,* helping to soften lines and wrinkles that form from repeated facial movements — like frowning or squinting.
Facial expression muscles*: The muscles you use when smiling or frowning. Botox works by temporarily reducing their movement, which helps smooth out the wrinkles they create.
Because Botox works by acting on muscle tissue rather than filling in skin, it takes time for the active ingredient to take effect at the neuromuscular junction. That's why results appear gradually over several days, not the moment you leave the clinic.
When Do Results Start to Show?
Most people begin to notice changes around days 2–3. According to a published review on Botox onset timing, results often appear within 2–3 days, with some patients noticing effects as early as 24 hours — and by day 7, the majority of patients observed visible improvement.
A clinical study on glabellar lines (frown lines) similarly found that most participants showed improvement in dynamic wrinkles by day 2, with results continuing to become more defined over the following two weeks. So if you don't see a difference the next morning, that's perfectly normal — give it a few days.
How Long Do Results Last?
Results generally last for several months. According to a comparative study on the duration of different Botox formulations, results lasted approximately 4–5 months depending on the product used.
How long results last depends on the specific product, the dosage, the treatment area, and your individual muscle habits. Many patients choose to return for a follow-up procedure as the effects gradually wear off — and the ideal timing for that is best determined by monitoring when your natural expression begins to return.
What to Keep in Mind Before Your Procedure
Since Botox results appear gradually, it's best to evaluate the outcome after a few days — not the next morning. If the effect seems mild right away, it's safer to wait about a week and then consult with your provider rather than immediately requesting additional units.
It's also worth noting that more frequent injections or unnecessarily high doses aren't always better. Timing your follow-up procedures to coincide with when your expression naturally returns tends to give the most balanced, natural-looking result. The appropriate dosage, treatment areas, and timing for any follow-up should all be discussed with your provider before your procedure.
At Beautystone Clinic Hongdae, We Walk You Through the Full Timeline
At Beautystone Clinic Hongdae, we don't just say "Botox smooths wrinkles" and leave it at that. We take the time to explain when you can expect to see results, how long they typically last, and when it makes sense to schedule a follow-up — because even with the same procedure, the timeline can look different depending on the area treated and your individual muscle patterns.
The right dosage and follow-up schedule are best worked out with your provider before your procedure. We're also conveniently located within walking distance of Hapjeong Station, so you're welcome to stop by for a quick consultation to go over the details before committing to anything.
Frequently Asked Questions
Q. When does Botox start working?
A. Most people begin to notice changes around days 2–3. Clinical data shows that some patients feel a difference within 24 hours, while the majority see visible results by day 7. The speed of onset does vary from person to person.
Q. If nothing looks different the next day, does that mean something went wrong?
A. Not at all. Botox is a procedure that works gradually over several days — seeing no change the morning after is completely normal. We recommend waiting about a week before drawing any conclusions.
Q. How long do results typically last?
A. According to clinical data, results lasted approximately 4–5 months depending on the product used. Duration can vary based on dosage, treatment area, and your individual muscle activity.
Q. If the effect seems weak, is it okay to get more Botox right away?
A. It's best to wait about a week and then discuss with your provider. Since results appear gradually, adding more too soon can lead to over-correction.
