An asymmetrical smile can stem from several different causes, and the right fix depends entirely on what’s creating the unevenness. Some people have teeth that are slightly off-center, others have a jaw that grew unevenly, and some developed asymmetry after a nerve injury like Bell’s palsy. Each of these situations calls for a different approach, ranging from simple exercises or injections to orthodontics or surgery.
What’s Causing Your Asymmetry
Before choosing a treatment, it helps to understand the three broad categories of asymmetry: dental, skeletal, and functional. Dental asymmetry means your teeth themselves are misaligned, missing, or differently sized on each side. Skeletal asymmetry involves the actual bone structure of your jaw or midface growing unevenly. Functional asymmetry happens when the muscles or nerves on one side of your face behave differently from the other, pulling your smile off-center even though the underlying bone and teeth may be fine.
Some causes are congenital, meaning you were born with them. Others develop over time from habits, tooth loss, or trauma. And acquired asymmetry often follows nerve damage, such as Bell’s palsy or facial surgery, where one side of the face loses some ability to move. Figuring out which category you fall into is the first step, because a treatment that works beautifully for a dental problem won’t help a nerve-related one.
Orthodontics for Dental Misalignment
If your asymmetrical smile comes from crooked teeth, a shifted midline, or a bite that doesn’t line up, orthodontic treatment is typically the most conservative starting point. Braces and clear aligners can shift teeth into symmetrical positions, close gaps on one side, and correct a midline that drifts left or right when you smile.
For mild cases, the fix can be as simple as elastic bands or minor tooth movement over six to twelve months. Moderate asymmetry usually takes twelve to eighteen months, and more severe misalignment can require up to two years. In some situations, an orthodontist will extract a tooth on one side but not the other (called asymmetric extraction) to create space that allows the remaining teeth to shift into a centered position. Small metal coils and anchoring devices help control exactly how each tooth moves so the result looks balanced.
Cost ranges from roughly $3,000 to $8,000 for clear aligners and $4,000 to $8,500 for traditional metal or ceramic braces, though this varies by region and complexity.
Veneers and Cosmetic Dentistry
Orthodontics moves teeth into better positions, but it can’t change a tooth’s color, shape, or size. If your asymmetry involves teeth that are naturally smaller on one side, peg-shaped, or discolored, porcelain veneers can mask those differences. Veneers are thin ceramic shells bonded to the front of your teeth, and they can correct minor positional issues, reshape uneven edges, and create the illusion of symmetry without moving the teeth at all.
For cases where the gum line is higher on one side, laser gum contouring (typically $800 to $3,000) can even out the tissue before veneers are placed. When both gum unevenness and tooth irregularities are present, dentists often combine crown lengthening surgery with veneers for a balanced result. If your teeth are severely crowded or rotated, though, orthodontic treatment should come first. Trying to veneer over major misalignment means removing more healthy tooth structure than necessary.
Botox and Fillers for Muscle Imbalance
When your teeth and jaw are fine but your smile still pulls to one side, the issue is usually muscular. One side of your face may have stronger or more active muscles than the other, tugging the corner of your mouth higher or wider. Botulinum toxin (Botox, Dysport, or Xeomin) can selectively relax the overactive side, letting the weaker side catch up and creating a more even smile.
Injections target specific muscles around the mouth, most commonly the one that pulls the corner of your lip downward (the depressor) or the one around the chin. The effect takes about two weeks to fully settle in and lasts roughly three to four months, so this is a maintenance treatment rather than a permanent fix. All three major brands of botulinum toxin produce similar results during the first four weeks.
Hyaluronic acid fillers can complement Botox by adding volume where one side of the face appears flatter or thinner. Placed strategically around the cheekbone or along the smile line, fillers can strengthen the appearance of the weaker side. Fillers are typically introduced about a month after Botox, once the muscle-relaxing effect has stabilized and the provider can see what additional volume correction is needed.
Fixing Asymmetry After Nerve Damage
Bell’s palsy, stroke, or surgical trauma can leave one side of the face partially paralyzed. As the nerve heals, it sometimes reconnects improperly, causing a condition called synkinesis, where unrelated muscles fire together. You might notice your eye squinting shut when you try to smile, or your neck tightening when you blink. This kind of asymmetry requires a layered treatment approach.
Neuromuscular Retraining
Physical therapy specifically designed for facial nerves, called neuromuscular retraining, teaches you to isolate and retrain individual muscle movements. Sessions typically run weekly and include facial exercises, massage, relaxation techniques, and biofeedback using sensors that show you which muscles are firing. A related approach called mime therapy combines self-massage, coordination drills, and exercises for emotional expression. These therapies won’t restore full nerve function, but they can meaningfully improve symmetry by retraining the patterns your brain uses to control your face.
Targeted Botox
For synkinesis, Botox serves a dual purpose. On the affected side, small doses (as low as 2 units per injection point) can quiet muscles that fire involuntarily. On the healthy side, slightly relaxing overactive muscles keeps them from overpowering the weaker side. Common targets include the muscle around the eye, the chin muscle, the lip depressor, and the neck band muscle. Providers generally avoid injecting the main smiling muscles on the weakened side, since further reducing their function would make the asymmetry worse.
Surgical Reconstruction
When synkinesis is moderate to severe and non-surgical options aren’t enough, surgery can physically rewire the system. Selective neurectomy cuts specific nerve branches to separate smile movement from involuntary eye closure. Myectomy removes small portions of overactive muscles, and studies suggest it produces better outcomes than nerve cutting alone because of how unpredictably nerve branches reconnect.
For the most severe cases, surgeons can transplant a functioning muscle from the inner thigh (the gracilis muscle) to the face, connecting it to a nerve that normally controls chewing. This gives the transplanted muscle a new power source, creating a smile mechanism independent of the damaged facial nerve. A cross-facial nerve graft can be added to help synchronize the rebuilt smile with the healthy side, restoring some degree of spontaneous, emotion-driven movement.
Jaw Surgery for Skeletal Asymmetry
When the bones of the jaw or midface are themselves uneven, no amount of braces, Botox, or veneers will fully correct the problem. Orthognathic surgery repositions the upper jaw, lower jaw, or both, physically reshaping the skeletal framework of the face. This is the only way to change the underlying bone structure.
Jaw surgery is typically recommended after non-surgical options have been exhausted. Most patients wear braces for several months before surgery to align the teeth within each jaw, then the surgeon repositions the jaws and fixes them in place with small plates and screws. The initial recovery period is one to two weeks, but complete healing and final alignment take six to twelve months. Orthodontic fine-tuning usually continues after surgery to ensure the bite settles properly.
Do Facial Exercises Work on Their Own?
You’ll find plenty of online programs promising to fix an asymmetrical smile through facial exercises alone. The clinical evidence is limited but not entirely discouraging. In small studies, participants who performed weekly sessions of isometric and isotonic exercises, stretching, and facial massage for five to twelve weeks reported improved facial symmetry, reduced muscle tension, and greater satisfaction with their appearance. One study of four women aged 55 to 87 found measurable decreases in the distance from the corner of the mouth to the ear, suggesting real structural change.
The catch is that these studies are small, mostly involving fewer than a dozen participants, and they lack control groups. Objective agreement among specialists evaluating the results was inconsistent in at least one study, even when the patients themselves felt they looked better. Exercises are most likely to help when asymmetry comes from muscle habit or tension rather than from bone structure, missing teeth, or nerve damage. They cost nothing and carry no risk, so they’re worth trying as a starting point, but they probably won’t replace professional treatment for anything beyond mild unevenness.
Choosing the Right Approach
The path to a more symmetrical smile depends almost entirely on the root cause. A dentist or orthodontist can identify dental and skeletal issues with X-rays and clinical examination. If the problem is muscular or nerve-related, a facial plastic surgeon or neurologist is the right starting point. Many people end up combining treatments: orthodontics to straighten the teeth, then veneers to even out shape and color, or Botox to balance muscle pull followed by filler to restore volume.
Timelines range from two weeks for Botox to take effect, to two years for complex orthodontic cases, to a full year for surgical recovery. Costs span from essentially free (exercises) to tens of thousands of dollars for jaw surgery or muscle transplantation. The most important first step is getting the right diagnosis, because treating a skeletal problem with Botox or a nerve problem with braces wastes both time and money.