Crooked or asymmetric lips are extremely common, and most people have some degree of unevenness. Fixing them depends entirely on the cause: a habit like chewing on one side, a dental issue, muscle imbalance, or simply natural variation in how your face developed. Options range from free daily exercises to injectable treatments to surgery, so the right approach comes down to how pronounced the asymmetry is and what’s driving it.
Why Lips Look Crooked
Almost no one has a perfectly symmetric face. But when lip asymmetry is noticeable enough to bother you, it usually traces back to one of a few causes. Skeletal asymmetry, where your jaw or teeth sit unevenly, pulls the soft tissue of your lips off-center. Habitual behaviors like sleeping on one side, chewing food predominantly on one side, or resting your chin in your hand can gradually shift muscle tone and tissue over time.
Muscle imbalance is another common culprit. The muscles around your mouth may be stronger or more active on one side, pulling your smile or resting lip position unevenly. Previous dental work, missing teeth, or a shifted bite can do the same thing. And if you’ve had lip filler in the past, uneven placement or filler migration can create asymmetry that wasn’t there before.
When Crooked Lips Signal Something Serious
If your lip asymmetry appeared suddenly, that’s a different situation entirely. A drooping lip on one side is one of the hallmark signs of stroke. The acronym BE FAST helps you spot the warning signs: balance loss, eye or vision changes, face drooping, arm weakness on one side, speech difficulty, and time to call emergency services. Stroke also causes numbness on one side of the body and trouble walking.
Bell’s palsy can also cause sudden one-sided facial drooping, but it never involves arm or leg weakness or difficulty moving the eyes or tongue. A doctor can distinguish between the two using imaging and nerve testing. If your lip crookedness came on gradually or has always been there, it’s almost certainly structural or muscular rather than neurological.
Facial Exercises for Mild Asymmetry
For subtle unevenness caused by muscle imbalance, targeted facial exercises can help over time. The basic principle is simple: you strengthen the weaker side while relaxing the dominant side. Exercises typically involve holding exaggerated expressions (a wide smile, a pucker, an “O” shape) and focusing effort on the less active side of your mouth. Consistency matters more than intensity. Aim for two to three short sessions daily, each lasting just a couple of minutes.
Results from exercises are gradual and work best for mild asymmetry. If your crookedness comes from bone structure or significant volume differences, exercises alone won’t fully correct it. But for people whose unevenness shows mainly when they smile or talk, building balanced muscle control can make a visible difference over several weeks.
Fillers and Botox for Balanced Lips
Injectable treatments are the most popular option for correcting lip asymmetry without surgery. They work in two distinct ways, and some people benefit from both.
Hyaluronic acid fillers add volume to the thinner or flatter side of your lips, evening out the overall shape. Strategic placement can also provide a gentle lift, making a smile appear more even. Fillers last 6 to 12 months on average. The national average cost is around $959 per session, though prices range widely from roughly $330 to over $2,000 depending on the product and provider.
Botox works differently. Instead of adding volume, it relaxes overactive muscles that may be pulling one side of your mouth more than the other. A “lip flip,” where small amounts of Botox are injected along the upper lip border, can also subtly roll the lip upward for a more even appearance. A lip flip typically costs $175 to $300 and lasts about two to three months.
For people whose asymmetry is most noticeable during expressions (smiling, laughing, talking), Botox on the stronger side can tone down the pull and create more balanced movement. For asymmetry visible at rest, fillers on the thinner side are usually the better starting point.
Fixing Asymmetry From Old Filler
If your lips became crooked after a previous filler treatment, the fix may be dissolving what’s already there rather than adding more. Filler can migrate away from where it was originally placed, creating lumps or unevenness that worsens over time.
Dissolving filler is a quick in-office procedure. A provider applies numbing cream, then injects an enzyme called hyaluronidase with a thin needle. This enzyme breaks down the hyaluronic acid in the filler. The whole process takes 10 to 15 minutes. If only one area is uneven, partial dissolving is possible using a smaller amount of the enzyme, so you don’t have to start completely from scratch.
Orthodontic Correction
When lip asymmetry stems from your bite or jaw position, no amount of filler or exercise will fully fix it because the underlying structure is off. Braces and clear aligners can correct uneven bites, shifted dental midlines, and minor jaw discrepancies. Braces use consistent force, sometimes supported by elastics or specialized appliances, to guide the jaw into better alignment. Clear aligners can address minor asymmetries caused by shifting or uneven tooth wear.
Correcting jaw alignment changes more than your bite. It subtly reshapes how soft tissue drapes over bone, often improving lip symmetry, jawline definition, and overall facial balance. Treatment timelines vary, but improvement in symmetry is typically visible gradually throughout the process. For more severe skeletal asymmetry, jaw surgery (orthognathic surgery) may be recommended alongside orthodontic treatment.
Surgical Options
For permanent correction, lip lift surgery directly reshapes the lip tissue. The most common type is the bullhorn (subnasal) lip lift, where a surgeon makes an incision shaped like a bullhorn just below the nose and lifts the center and sides of the upper lip. This works well for asymmetry involving a long or drooping upper lip.
A corner lip lift targets the edges of the mouth specifically, elevating downturned or drooping corners into a slight natural smile. This is a good fit if your asymmetry is most visible at the lip corners rather than the center. After either procedure, expect swelling, soreness, and tightness. Stitches are removed within a few days or dissolve on their own. Results are permanent, unlike fillers that require maintenance visits.
Makeup Techniques for Instant Results
While you decide on (or wait for) longer-term solutions, overlining with lip liner can visually balance uneven lips right away. The key is restraint: stay within about one millimeter of your natural lip line to keep the look realistic. Start by drawing a V shape just outside your cupid’s bow, with the two lines meeting in an X inside your actual lip. This sharpens and lifts the bow.
Then draw a line just below the center of your lower lip and fill in the outer corners. Focus your overlining on the thinner or less defined side to match the fuller side. Only overline the center of both lips, keeping liner inside your natural border at the outer corners. Apply concealer around the edges to clean up the line and blend the illusion. With practice, this technique takes under a minute and can make a surprisingly noticeable difference.