What this page covers
You've just had a lip flip and you're trying to work out whether what you're seeing in the mirror is normal, whether the effect is developing on schedule, and what to expect over the coming days and weeks. This page is the day-by-day and week-by-week guide written for exactly this stage of the patient journey.
The framing is honest about variation. Patients sometimes search "lip flip results timeline" expecting a chart that says "by day X you will see Y." The clinical reality is more variable — patients respond on slightly different schedules, with slightly different peak effects, and the subtle nature of the lip flip means visible change is sometimes harder to identify than patients expect. The honest framing matters.
For the treatment overview, see Lip Flip London. For aftercare, see Lip Flip Aftercare. For side effects, see Lip Flip Side Effects.
The honest expectation framing
Before the day-by-day breakdown, the honest position about timeline expectations:
Lip flip results develop gradually over 1-2 weeks — not immediately, not visibly from day one. The treatment isn't designed to produce instant change; the medicine, as with any anti-wrinkle treatment, takes time to act on the targeted muscle, and visible result emerges as muscle activity reduces.
The effect is intentionally subtle — millimetres of muscle activity reduction, not the visible volume change that lip fillers produce. Patients sometimes search "lip flip results day 3" expecting to see dramatic before-and-after differences, and find themselves uncertain whether anything has changed at all. This is normal. The subtle change is the point, and visible effect at the peak window (day 14) is reliably present even when the change is small.
The development pattern varies between patients. Some patients see early changes from day 3-4; some don't notice anything until day 7-10. Both patterns are within normal variation, and neither predicts a better or worse final outcome.
The most useful approach during the development window is to take photos and trust the process, rather than checking the mirror anxiously throughout the first week. The 2-week complimentary review is when peak effect is assessed and any adjustments planned.
Day-by-day timeline (week 1)
Day 1 (treatment day). Immediately after treatment, the lip area may show pinpoint redness at injection sites and very mild swelling. This is the body's response to the injection itself, not to the medicine's intended effect. By the evening of treatment day, the injection-site reactions have typically settled. No visible lip-flip effect yet — the medicine hasn't started acting on muscle activity.
Day 2. Most patients report nothing noticeably different from before treatment. Injection sites are settled or settling. The lip looks and feels normal at baseline. No lip flip effect visible. This is appropriate; effect hasn't started developing yet.
Day 3. The medicine is beginning to act at the muscle level. Some patients note a subtle change in how the lip feels — a slight awareness that "something is different" when speaking or smiling, sometimes described as the lip feeling slightly looser or slightly heavier at rest. Visible change is rarely apparent yet. Don't panic if you see nothing visible; this is on schedule.
Day 4-5. Effect development continues. Patients who are paying close attention sometimes notice the upper lip looks marginally different at rest — slightly less inward-tucked than before. Patients not paying close attention often still see nothing visible. Both experiences are normal. The change is genuinely subtle; the day-4-5 visibility depends on how observant you're being and how dramatic your individual response is.
Day 6-7. By the end of week 1, most patients see something visible — typically subtle change in how the upper lip looks when smiling. The upper lip stays more visible during smile than before treatment (the orbicularis oris is no longer pulling it inward as strongly). Some patients see this immediately; others need to compare photos before they're confident the change is real.
Day-by-day timeline (week 2 — peak effect window)
Day 8-10. Effect is reaching its peak. Most patients clearly see the change now — both at rest and during smile. The lip looks subtly fuller at rest; the smile shows more upper lip than before. Photos from this period reliably show the lip-flip effect when compared to pre-treatment photos. Our lip flip before and after page shows realistic examples.
Day 11-13. Peak effect window. Effect is at its strongest. This is the period when the lip flip looks the way it's going to look at its best.
Day 14 — peak effect + complimentary review. The 2-week mark is when peak effect is reliably present and stable enough to assess. This is when the complimentary review is scheduled at DWL. The review covers:
- Assessment of the result with comparison to baseline photos
- Discussion of how the result feels to you
- Identification of any subtle asymmetry that could be addressed with small additions
- Planning for the next treatment if continuous maintenance is desired
- Any specific observations about how the lip has behaved during the development window
The review takes 15-20 minutes and is included in the lip flip treatment service.
Week 2 onwards — what the peak result looks like
The peak effect of a lip flip looks like this:
At rest. Upper lip appears very slightly fuller than baseline — millimetres of difference. The lip is the same size and shape; the muscle that was pulling it inward is now less active, so the lip position is slightly less tucked. The change is intentional subtle. Patients often describe this as "my lip looks more relaxed."
When smiling. Upper lip stays meaningfully more visible during smile than before treatment. The "thin smile" or "disappearing upper lip" pattern that often motivates lip flip treatment is softened. The smile shows more upper lip and less of the inward-tucking that the muscle was producing.
When speaking. Most patients notice nothing different. Speech function is preserved; lip seal during normal speech is maintained. Some patients note brief altered articulation of plosive sounds (p, b) that resolves within the first week or two — this isn't a peak-effect issue, it's a development-window adjustment.
When eating and drinking. Normal function. The small dose used in a lip flip doesn't affect eating or drinking once initial settlement is complete. Drinking from a straw is the exception — slight altered sensation is common, settles within the first week.
Aesthetically. The natural aesthetics outcome — the subtle, considered enhancement that supports facial symmetry and perfect balance without producing obviously-treated appearance. This is what good lip flip work looks like at peak; the principle of proportionate treatment shows in the result.
Week 3-6 — sustained effect window
Through weeks 3-6, the peak effect holds steady. The lip continues to look the way it did at the 2-week review.
This is the sustained-effect period — most of the lip flip's "useful life" sits here. Patients enjoy the result and rarely think about the treatment during this window unless something prompts them to.
If small asymmetry was noted at the 2-week review and not adjusted, this period is when the patient sees consistently whether they want to address it at the next treatment.
If photos taken at week 4 are compared to pre-treatment baseline, the difference is reliably visible. This is also the period when partners, friends, or close family sometimes notice "something different" without being able to place what — which is the natural aesthetics outcome working as intended.
Week 6-10 — gradual fading
Effect begins to fade gradually from approximately week 6-7 onwards. The fading is gradual rather than sudden — the muscle progressively regains activity as the medicine metabolises.
Most patients notice the fade beginning at:
- Slightly more inward-tucking of the upper lip at rest
- Slightly more upper-lip disappearance during smile
- The pattern they had before treatment slowly returning
By week 10, most patients are at or near baseline. Some patients hold effect a little longer; some return to baseline a little sooner. The 6-10 week range covers most patient experiences.
This is when patients booking continuous maintenance typically schedule the next treatment. Some prefer to schedule at the 2-week review with a flexible date; some wait until they notice the fade beginning.
Why timeline varies between patients
The 7-14 day peak window covers most patient experiences, but individual variation is real. Factors affecting timeline:
Individual metabolism. Some patients metabolise the medicine slightly faster or slower than the typical pattern. Faster metabolism = shorter duration; slower metabolism = longer duration. This is genetic and not adjustable through behaviour.
Muscle activity level. Patients with high baseline muscle activity (visible at consultation as prominent philtral grooves, deep inward lip-tucking during smile) sometimes see effect develop slightly slower — the medicine has more muscle activity to overcome. Patients with subtler baseline activity sometimes see effect develop slightly faster.
Dose received. Higher doses develop slightly more dramatically (within the still-small lip flip range); lower doses develop more subtly. Effect timeline itself doesn't change meaningfully, but visibility at each timepoint does.
Placement precision. Better placement produces cleaner, more visible effect at the same dose; less precise placement may produce less visible effect or unwanted spread. This is why technique matters — see Lip Flip Technique for the detailed discussion.
Patient observation. Patients who pay close attention to the lip during development sometimes notice changes earlier; patients who go about their lives normally sometimes don't notice until photos prompt comparison.
The honest framework: trust the 7-14 day window. If at the 2-week mark you're not sure the effect has developed, the review is the right setting for assessment. If at the 2-week review the result is genuinely too subtle for what you wanted, small additions are sometimes possible; if the dose was as intended and you wanted more visible change, the next treatment can be planned with adjusted dose.
What to do if you don't see results
The most common concern at week 1-2 is "I don't see anything different." The framework for thinking about this:
Compare with baseline photos. The most reliable way to assess your own lip flip result is comparison with photos taken before treatment under similar lighting and angle. The change is genuinely subtle; without baseline comparison, you may not notice it.
Wait for the 2-week review. The clinician has the trained eye for subtle change and access to the baseline photos in your record. The review is where uncertain self-assessment becomes clear clinical assessment.
Note specific things you're looking for. "Less inward-tucking when smiling" is more identifiable than "fuller lips." If you can articulate what specifically you want different, you'll more reliably notice whether it's happening.
Consider whether the dose was conservative. First lip flip treatments are sometimes done at slightly conservative dose to assess your specific response before titrating up. If the result was meaningful but subtle, the next treatment can be planned at slightly higher dose if you want more visible effect.
Don't conclude "it didn't work" before 2 weeks. Effect peaks at 14 days. Earlier assessment is unreliable. Patients who panic at day 7 and decide it didn't work usually find at day 14 that it did.
If at 2 weeks the result is genuinely absent. Unusual but possible — placement issues, dose insufficiency, individual response factors. The review is where this is identified, and the appropriate response is planned (sometimes a small addition; sometimes adjusted approach at next treatment).
Frequently asked questions
When does a lip flip start working? Effect typically begins to develop around days 3-5 after treatment. Visible change is rarely apparent in the first 2 days; subtle changes emerge during days 3-7; visible peak effect at day 14.
How long until lip flip results peak? Peak effect at approximately 14 days post-treatment. Effect develops gradually from day 3-5 onwards, reaches full visibility around day 10-14, and holds at peak through approximately week 6.
Why can't I see my lip flip results at day 7? Day 7 effect is genuinely subtle in many patients. The medicine takes 7-14 days to reach full effect; partial effect at day 7 is normal. Most patients see clearer effect by day 10-14. If at day 14 you still can't see effect, the complimentary review is the right setting for assessment.
Day 3 lip flip results — what should I see? Often nothing visibly different. The medicine is just beginning to act. Some patients note subtle changes in how the lip feels rather than how it looks. Visible change usually appears from day 5-7 onwards.
Lip flip not working after 2 weeks — what do I do? Schedule or attend the 2-week review. The clinician's assessment with comparison to baseline photos usually reveals subtle change that the patient hadn't noticed. If at review the result is genuinely absent, small additions may be planned, or next treatment with adjusted dose.
How long do lip flip results last? 6-10 weeks typically. Effect holds at peak through approximately week 6, gradually fades from week 6-7 onwards, and reaches baseline by week 8-10 for most patients.
Will the next lip flip treatment give faster results? Sometimes. Patients who've had lip flip before respond on similar timelines but sometimes notice effect earlier because they know what to look for. The biological development pattern doesn't speed up; the patient's perception of it sometimes does.
Information about the 2-week review at DWL
The complimentary 2-week review is part of the lip flip treatment service at DWL. The appointment is included in the original treatment cost and provides the structured assessment of your peak effect with the clinician who delivered the treatment.
The review covers: clinical assessment of result with baseline-photo comparison, discussion of patient experience during development window, identification of any subtle asymmetry, planning for adjustments where useful, and discussion of next-treatment timing if continuous maintenance is desired.
Booking: Call 020 8127 4567 or WhatsApp +44 7974 910222 to schedule.
Appointments Monday-Friday, 8am-7pm by appointment.
Dental & Wellness London · 222 Essex Road, Islington, London N1 3AP.
Reviewed by Dr Vishal Patel · BDS Liverpool · MSc Aesthetic & Restorative Dentistry (Manchester) · GDC 103127 · AACD Member. Last reviewed 2026-06-05.
Prescribed by Dr Vishal Patel, BDS, MSc Aesthetic & Restorative Dentistry, GDC 103127.
