Most faces are slightly uneven, and that is normal. How to fix an asymmetrical face depends on the cause: uneven muscle pull, volume loss on one side, loose skin, or a difference in the bone. Botox, dermal filler, and full facial balancing treat the first two; bone-based asymmetry may need orthodontics or surgery.
Written by Jen Adams, BSN, RN
Medically reviewed by Dr. Josh Allen, D.O., Medical Director, October 23, 2026
Last updated October 2026
Disclaimer: This article is for general education and is not medical advice. Individual results vary and no outcome is guaranteed. Talk to a licensed provider about your own situation.
Yes. Nearly everyone has some difference between the left and right side of the face, and in most people it stays subtle enough that no one else notices it. A review of the research on facial asymmetry reports that studies of orthodontic patients in the United States found asymmetry on a clinical exam in 12% to 37% of them, and that the share rose above 50% when imaging was used.
What matters for you is not whether your face is perfectly symmetrical, since almost no face is, but how noticeable the difference is, what is driving it, and whether it bothers you enough to do something about it.
Facial asymmetry comes from a handful of well-documented causes, and many faces show more than one at once. Medical literature groups them into three broad categories: conditions present at birth, changes that happen during growth, and acquired causes such as injury or disease. Here is what typically drives a visible difference between the two sides of the face.
Bone structure, facial proportions, and muscle strength are largely inherited, and perfectly matched sides are rare. If your parents have noticeable asymmetry, there is a good chance you do too.
With age, facial bone changes, fat pads shift and thin, and skin loses elasticity, and these changes do not always happen evenly on both sides. That is why asymmetry that was barely visible earlier in life can become more noticeable over time.
Repetitive facial movements tend to favor one side. Chewing on one side or squinting in bright light can make the muscles on that side work harder over the years, which can show up as uneven expression lines or a fuller jaw muscle on one side.
Bite misalignment, jaw clenching, and TMJ problems can pull the jaw off-center and change proportions on one side. In orthodontic studies, a chin that sits off-center is the most frequent sign of facial asymmetry, and it is often linked to the bite or jaw.
A broken nose, a cheekbone fracture, or a soft tissue injury that healed unevenly can leave lasting asymmetry. Even injuries that did not seem significant at the time can change the position of underlying structures.
Sleeping on the same side every night, long hours on your phone with your head tilted, or chewing on one side can add small, cumulative differences over years. These are the habits most worth changing early, since they are the easiest cause to address yourself.
Most people looking into facial asymmetry are not dealing with a structural problem that requires surgery. Muscle- and volume-based asymmetry often responds well to non-surgical treatment, and the right option depends on what is actually driving the unevenness. Here is how each cause maps to a treatment.
Uneven muscle pull. When one side of the face moves more than the other, such as a brow that lifts higher or a smile that pulls more to one side, Botox can relax the more active muscle so both sides move more evenly.
Uneven volume. If one cheek sits flatter or one side of the jawline looks less defined, dermal filler restores volume on the side that needs it, rather than adding to the side that does not.
Several areas at once. When more than one area is uneven, full facial balancing treats the face as a connected system instead of one feature at a time, so your injector can see how a change in one area affects the others. At InjectCo, Botox is $12 per unit, and filler and full facial balancing are $699 per syringe; your injector gives you a specific plan and total at your consultation. You can see what facial balancing costs by treatment area, and how it compares with single treatments in our facial balancing vs Botox vs fillers guide.
Uneven, heavy jawline. When one or both sides of the jaw look wider because of an overworked masseter muscle, masseter Botox for an uneven jaw is a common non-surgical option for slimming the muscle. A 2025 review in the journal Toxins describes Botox injections as the current standard non-surgical treatment for an enlarged masseter, with no single agreed dosing protocol, so the amount is set for you individually. Masseter Botox is an off-label use, which your injector explains before treatment.
Results with Botox and dermal filler are temporary and vary by product, dose, and the area treated. The FDA’s dermal filler page notes that some fillers are naturally absorbed over time and that how long the effect lasts depends on the filler material and where it is injected.
Two other non-surgical options are worth knowing about: PDO thread lifts can help with mild sagging on one side, and microneedling can help when the unevenness is more about skin texture or scarring than structure. Ask which of these is available at your location when you book.
Learn what full facial balancing covers at InjectCo.
Filler and full facial balancing $699 per syringe. Botox $12 per unit.
Many people ask whether they can fix facial asymmetry at home without treatment. The honest answer is: sometimes, but only when the asymmetry is very mild, and natural methods work on muscle tone and swelling, not on structure.
Natural methods can help with posture, puffiness, muscle tension, and overall skin quality. What they cannot do is change your bone structure, replace lost volume, or correct asymmetry that clearly shows up in photos. A few habits worth trying if your unevenness is subtle:
If the asymmetry is obvious in photos, videos, or your smile, a non-surgical treatment usually gives a more reliable and faster result than natural methods alone.
Some asymmetry is not a muscle or volume problem, and no amount of filler or Botox will fix it. When the jaw is truly misaligned, or the asymmetry affects your bite, chewing, or breathing, the underlying structure needs to be addressed directly.
Bite misalignment and skeletal jaw asymmetry are often treated with orthodontics alone or with orthodontics combined with orthognathic surgery, which repositions the jawbone itself. A consultation with an orthodontist or oral surgeon, not a med spa, is the right next step if your asymmetry involves your bite or jaw function rather than soft tissue or volume.
Most facial asymmetry develops slowly over years and is not a medical emergency. New, sudden asymmetry is a different situation, and it is worth knowing the difference before you assume it is cosmetic.
Sudden drooping on one side of the face, numbness, slurred speech, or weakness that appears quickly can be signs of Bell’s palsy or a stroke, and both need medical evaluation right away, not a consultation for cosmetic treatment. If anything about your asymmetry came on suddenly rather than gradually, seek medical care first.
Facial asymmetry usually comes down to genetics, aging, uneven muscle use, dental or TMJ issues, or past injury. Asymmetry can become more noticeable with age because bone, facial fat, and skin elasticity do not always change evenly on both sides. In many cases, more than one of these factors is involved at once.
Botox can help when asymmetry comes from uneven muscle activity, such as one brow sitting higher or a smile that pulls more to one side. It relaxes the more active muscle so both sides move more evenly, and it is also used off-label for an overworked masseter muscle that makes the jaw look wider on one side. It will not change asymmetry caused by bone structure or lost volume.
Filler can correct asymmetry that comes from uneven volume, such as a flatter cheek or a less defined side of the jawline. It works by restoring volume on the side that needs it rather than adding to the side that does not. It will not change a structural or bone-based difference between the two sides of the face.
Face exercises may offer very mild support for muscle-based asymmetry, but the evidence that they meaningfully change adult face shape is limited. They cannot correct asymmetry caused by bone structure or volume loss. For asymmetry visible in photos, Botox, filler, or full facial balancing usually gives a faster and more reliable result.
Mild to moderate jaw asymmetry can often be improved without surgery. Masseter Botox can slim an overworked jaw muscle, and jawline filler can add definition to the weaker side to improve visual balance. Asymmetry tied to a bite or skeletal problem usually needs orthodontics or, in more significant cases, orthognathic surgery instead.
Botox and dermal filler are temporary, but results can be maintained with repeat visits as needed. For asymmetry caused by bone structure or a bite problem, orthodontics or orthognathic surgery addresses the underlying cause directly rather than managing it with injectables. Which approach makes sense depends on what is causing your asymmetry, which is why a proper evaluation matters more than picking a treatment first.
If you have one specific concern, like an uneven brow, one fuller lip, or a jawline that pulls slightly to one side, a targeted Botox or filler treatment may be enough to improve it in one appointment.
If your goal is to make the whole face look more balanced, full facial balancing looks at the face as a whole. Instead of treating one feature by itself, your injector maps the face and uses Botox, fillers, or other injectables so each adjustment works with the next.
Not sure what your face actually needs? Book a consultation and a nurse injector will assess your concerns, explain your options clearly, and recommend a realistic plan.
An InjectCo nurse assesses your face and talks you through your options.
Filler and full facial balancing $699 per syringe. Botox $12 per unit.
