The Art of Choosing Between a Lip Flip and Lip Filler
For years, I have helped countless patients decide between two transformative treatments: the lip flip and lip filler. The choice is not always obvious, and it depends entirely on the unique shape, size, and behavior of your lips—especially when you smile. I have seen the lip flip create such a beautiful, natural enhancement that some people no longer desire filler at all. But it is not a one-size-fits-all solution. The secret lies in understanding your own lip type and how it moves. Let me walk you through what each treatment does, how they differ, and how you can decide which path is right for you.
What a Lip Flip Really Does
A lip flip uses neuromodulators like Botox or Dysport to weaken the muscles surrounding your upper lip. This relaxation causes the lip to relax slightly outward, or evert, making the Cupid's bow area appear fuller. It is a remarkably quick procedure—measured in units of neuromodulator, not in volume of filler. The effects are subtle but powerful.
The pros of a lip flip are many. It works entirely on the muscle, so no filler is injected into the lip tissue itself. This means zero risk of filler-related complications in that area. For people who lose their upper lip when they smile—a common concern—the lip flip can keep it gently flipped out, preventing that disappearing act. It can also soften a gummy smile and reduce the appearance of upper lip wrinkles or smoker's lines. There is virtually no downtime, hardly any bruising, and it is significantly cheaper than lip filler or Botox in other areas. The best part? You can try it and see for yourself.
But there are cons, too. Some people dislike the temporary weakening sensation. It can make activities like whistling, holding mouthwash, scuba diving, snorkeling, or playing a wind instrument more difficult. I always advise people to try the lip flip at least twice, because the odd feeling often fades after a week or two. The results are not immediate—they take about a week to start showing, with full effect at two weeks. And a lip flip only enhances the upper lip, not the lower. It cannot enlarge your lips the way filler can; it is not a substitute for volume. Instead, it is a tool for refinement and movement.
The Power of Lip Filler
Lip filler, on the other hand, is a different category entirely. It uses hyaluronic acid gel to physically fill and enlarge the lip tissue. It is measured in volume—typically by syringe, where one syringe equals one milliliter. You can use less than a full syringe for a subtle boost.
The biggest pro of lip filler is the sheer enhancement it can provide. There is simply no comparison to the volume and definition you can achieve with filler versus a lip flip, because you are actually enlarging the tissue rather than relaxing the muscle. Results are immediate, and if you are unhappy, you can dissolve the filler using hyaluronidase, an enzyme that breaks down hyaluronic acid.
But the cons are significant. Finding the right injector is absolutely critical for natural-looking results. Over-injection and migration are common pitfalls. Bruising is always possible, no matter the skill of the injector. Swelling is expected—typically lasting two to three days for natural results, though some people love the fuller look during swelling. More serious complications, such as vascular occlusion, can occur if filler accidentally enters a blood vessel. So lip filler carries more potential risks than a lip flip.
Seeing the Difference: Two Real Patients
Let me share two patient stories that illustrate exactly how these treatments work in practice.
Patient One came to me with a fairly full lip size, but when she smiled, her upper lip inverted or flipped inward. She had been over-lining her lips with makeup for years to create the look she wanted, and she was tired of the constant maintenance. She chose the lip flip first because she wanted a natural, subtle result that would stand out without being obvious. I used eight units of Botox, customized to her lip size. After a few days, she noticed the numbness and the new position of her lip. Once she got used to it, she loved it. She no longer felt the need to over-line her top lip. Her results showed a clear enhancement of the upper lip and a smile that no longer inverted. She was so happy that when we discussed filler, she only wanted a tiny amount on her lower lip to add definition. I used less than half a syringe on her lower lip alone, and she was thrilled with the balanced, natural outcome.
Patient Two had a smaller lip size, but her lips did not invert when she smiled. She had no gummy smile. Because her lips were thinner, I used only six units of Botox initially. The lip flip did soften her upper lip lines when she pursed her lips, but the overall enhancement was modest. She did feel the weakening sensation, which told me we had used enough units for her size. But because her lips did not invert and she had a smaller lip base, she was a much better candidate for lip filler to achieve real volume. After the lip flip, we proceeded with close to a full syringe of filler to her lips. The difference was dramatic—she gained volume and definition that the lip flip alone could not provide.
How to Decide: The Lip Fullness Scale
To help you decide where you fit, I have developed a simple scale: very thin, thin, moderately thick, thick, and very thick.
If you have thinner lips—type 1 (very thin) or type 2 (thin), and possibly even type 3 (moderately thick)—you are likely a good candidate for lip filler, because it can give you more enhancement than a lip flip can. However, if your lips of any thickness invert when you smile or you have a gummy smile, a lip flip can benefit you even if you also get filler. The lip flip works on the muscle to prevent the disappearing act and soften the gummy smile.
Most patients with type 1 or type 2 lips who start with a lip flip almost always move on to filler once they become comfortable with the idea of injectables. On the other hand, if you have type 4 (thick) or type 5 (very thick) lips, you can probably get away with just a lip flip and no filler. Most of my patients with fuller lips are happy with the natural enhancement of a lip flip alone.
My advice is always this: try the lip flip first. It is fast, low risk, and relatively inexpensive compared to other treatments. If you want more enhancement, you can always add filler later. But if you think you can never benefit from lip filler, I encourage you to keep an open mind—because the right treatment, in the right hands, can change everything.