Why Is My Jaw Crooked? 5 Causes & Treatments

A crooked jaw usually results from one of four things: the way your teeth fit together (malocclusion), a temporomandibular joint disorder (TMJ/TMD), uneven jaw growth during childhood, or habits like chewing on one side — and the good news is that most causes are treatable with orthodontics, physical therapy, or minor dental work.

If you've noticed your jaw looks uneven in photos, your bite feels off, or one side of your face seems longer than the other, you're not imagining it. Jaw asymmetry is incredibly common — studies show that nearly everyone has some degree of facial asymmetry, but it becomes noticeable when the difference exceeds 2–3 millimeters. Understanding why your jaw is crooked is the first step toward deciding whether you need treatment or simply reassurance.

What Causes a Crooked or Uneven Jaw?

Your jaw can appear crooked due to structural differences in the bone itself, misalignment of the teeth, muscle imbalances, or problems with the temporomandibular joint — and often it's a combination of factors rather than a single cause.

The human jaw is made up of two main bones: the mandible (lower jaw) and the maxilla (upper jaw). When these bones grow at slightly different rates, or when one side develops differently than the other, you end up with what doctors call jaw asymmetry. But bone structure isn't the only culprit — your teeth, muscles, joints, and even daily habits all play a role in how straight or crooked your jaw appears.

Does Malocclusion Make Your Jaw Look Crooked?

Malocclusion is the technical term for a "bad bite" — when your upper and lower teeth don't align properly. This is one of the most common reasons people notice their jaw looks uneven. If your teeth on one side meet differently than on the other, your jaw naturally shifts to compensate, which can make your whole face appear asymmetric.

There are several types of malocclusion that can cause a crooked appearance:

The good news is that malocclusion is highly treatable. Braces, clear aligners, and sometimes minor dental work can correct how your teeth meet, which often resolves the crooked jaw appearance without any surgery.

Can TMJ Disorder Cause Jaw Asymmetry?

Temporomandibular joint disorder (TMJ or TMD) affects the joints that connect your jaw to your skull — one on each side, right in front of your ears. When one of these joints becomes inflamed, damaged, or displaced, it can cause your jaw to sit unevenly.

"TMJ disorders can result in a functional deviation of the jaw, where the mandible shifts to one side during opening or closing. This can create the appearance of facial asymmetry even when the underlying bone structure is symmetric." — Dr. Louis G. Rafetto at the American Association of Oral and Maxillofacial Surgeons

Common signs that TMJ might be causing your crooked jaw include:

• Clicking, popping, or grinding sounds when you chew or yawn
• Pain near your ear or along your jawline
• Difficulty opening your mouth wide
• Your jaw "locking" in an open or closed position
• Headaches, especially in the morning

TMJ-related jaw crookedness often responds well to conservative treatments like physical therapy, night guards, and muscle relaxants. In more severe cases, injections or surgery may be recommended.

Also Read: Why Is My Jaw Tight? 7 Causes & How to Get Relief

Why Is My Jaw Longer on One Side?

True skeletal asymmetry — where one side of the jaw bone is physically larger or shaped differently than the other — typically develops during childhood and adolescence when the jaw is still growing, though it can also result from injury, infection, or certain medical conditions.

If you've measured your face and found that one side of your jaw is genuinely longer or wider than the other (not just shifted to one side), you're dealing with skeletal asymmetry rather than a functional problem. This is different from the bite-related or joint-related issues above because it involves the actual shape of the bone.

Did Uneven Jaw Growth Happen During Childhood?

Your jaw does most of its growing between ages 4 and 16, with a final growth spurt during puberty. If something disrupts growth on one side during this window, the result can be permanent asymmetry.

Common causes of uneven childhood jaw growth include:

• Condylar hyperplasia: One side of the jaw's growth center stays active longer than normal, causing that side to become larger
• Childhood injuries: A fall, sports injury, or accident that damages the growth plate on one side
• Infections: Serious ear infections or dental abscesses near the jaw joint can affect growth
• Torticollis: A condition where neck muscles are tight on one side, causing the head to tilt and the jaw to develop asymmetrically
• Hemifacial microsomia: A congenital condition where one side of the face develops smaller than the other

"Mandibular asymmetry often has its origins in early childhood, when trauma, infection, or abnormal growth patterns can permanently alter the development of one condyle relative to the other." — Dr. Joseph E. Van Sickels in Oral and Maxillofacial Surgery Clinics

If your jaw has been uneven for as long as you can remember, developmental asymmetry is the most likely explanation. This type of crookedness won't correct itself or respond to orthodontics alone — it may require orthognathic (jaw) surgery if the asymmetry is severe enough to affect function or cause significant distress.

Can Teeth Grinding Make Your Jaw Uneven?

Bruxism — the medical term for teeth grinding and jaw clenching — doesn't change your bone structure, but it can definitely make your jaw appear and feel crooked over time. Here's how:

Muscle hypertrophy: When you grind or clench habitually (especially at night), the masseter muscles on the sides of your jaw get a constant workout. If you clench more on one side than the other — which most people do — that muscle grows larger. This creates visible asymmetry at the angle of your jaw, even though the bone underneath is symmetric.

Joint damage: Chronic grinding puts enormous pressure on the TMJ. Over time, this can wear down the cartilage disc in the joint or cause inflammation, leading to the functional jaw shifts described earlier.

Tooth wear: Grinding wears down tooth surfaces unevenly. If you wear down one side more than the other, your bite changes, and your jaw adapts by sitting in a new position.

The fix for grinding-related asymmetry usually involves a custom night guard to protect your teeth and joints, along with exercises or physical therapy to relax overworked muscles. Some people also benefit from Botox injections to the masseter muscle, which shrinks the muscle and restores symmetry.

How to Tell What's Causing Your Crooked Jaw

Distinguishing between dental, muscular, joint, and skeletal causes requires a proper examination — but there are some clues you can look for at home to narrow down the possibilities before you see a professional.

Grab a mirror and try these quick self-assessments:

Check your bite: Close your teeth together normally. Do your front teeth line up? Does your jaw have to shift sideways to get your back teeth to meet? If yes, malocclusion is likely involved.

Open and close slowly: Watch your chin in the mirror as you open your mouth. Does it move straight down, or does it deviate to one side? A C-shaped or S-shaped path suggests TMJ involvement.

Feel your jaw muscles: Place your fingers on the bulky muscles at the corners of your jaw (your masseters) and clench. Is one side noticeably larger or more tense than the other? Muscle imbalance may be contributing.

Compare sides with a photo: Take a straight-on photo of your face with a neutral expression. Draw a vertical line down the center. Is one side of your jaw noticeably longer, wider, or shaped differently? If the bone itself looks different, skeletal asymmetry is more likely.

Treatments for a Crooked Jaw in 2026

Treatment depends entirely on the underlying cause — orthodontics can fix bite problems, physical therapy and night guards address TMJ and grinding, and orthognathic surgery is reserved for significant skeletal asymmetry.

Orthodontic Solutions

For malocclusion-related jaw crookedness, braces or clear aligners are often all you need. Modern aligners like Invisalign can correct crossbites, overbites, and other issues that cause your jaw to sit unevenly. Treatment typically takes 6–24 months depending on severity.

TMJ Treatments

If TMJ disorder is making your jaw crooked, treatment usually starts conservatively:

1. Night guard or splint: Reduces grinding and repositions the jaw
2. Physical therapy: Exercises to strengthen and stretch jaw muscles
3. Anti-inflammatory medications: NSAIDs to reduce joint inflammation
4. Muscle relaxants: For severe clenching
5. Trigger point injections or Botox: For muscle-related asymmetry

Surgery is rarely needed for TMJ but may be considered if conservative treatments fail after 3–6 months.

Orthognathic Surgery

For true skeletal asymmetry — where the bones are shaped differently — orthognathic surgery may be recommended. This involves cutting and repositioning the jaw bones to achieve symmetry. It's typically combined with braces (before and after surgery) and requires several weeks of recovery.

This is major surgery and is usually reserved for cases where asymmetry exceeds 5mm, causes functional problems (difficulty chewing, breathing, or speaking), or causes significant psychological distress.

Also Read: Why Is My Tooth Sensitive to Cold? 7 Causes & Treatments

When to See a Doctor About Your Crooked Jaw

Mild asymmetry is normal and doesn't require treatment, but you should see a professional if your crooked jaw is getting worse, causing pain, affecting your ability to eat or speak, or bothering you emotionally.

Seek evaluation if you experience:

• New or worsening asymmetry (your jaw wasn't always this crooked)
• Pain in your jaw, ear, or face
• Difficulty chewing, biting, or opening your mouth
• Frequent headaches, especially upon waking
• Teeth that are wearing down unevenly
• A feeling that your bite is "off" or constantly changing
• Significant self-consciousness about your appearance

Start with your general dentist, who can assess your bite and refer you to an orthodontist, TMJ specialist, or oral surgeon as needed.

In Short

A crooked jaw is usually caused by how your teeth fit together, TMJ problems, uneven muscle development from grinding, or skeletal differences that developed during childhood. Most cases can be improved with orthodontics, physical therapy, or a custom night guard — surgery is rarely necessary unless the bone asymmetry is severe. If your jaw crookedness is new, worsening, or causing pain, see a dentist or specialist for proper diagnosis.

What You Also May Want To Know

Why is my jaw uneven all of a sudden?

Sudden jaw unevenness is usually related to muscle spasm, TMJ inflammation, or a shift in your bite rather than a change in bone structure. If you've been under stress, grinding your teeth at night, or recently had dental work, these are the most likely culprits. True skeletal changes happen slowly over years, not suddenly — so if your jaw looks different overnight, something functional is going on that a dentist can usually address quickly.

Can a crooked jaw fix itself without treatment?

Mild functional asymmetry — especially if it's caused by muscle tension or temporary TMJ inflammation — can sometimes improve on its own with rest, stress reduction, and conscious effort to stop habits like one-sided chewing. However, structural issues like malocclusion or skeletal asymmetry will not resolve without treatment. If your crooked jaw has persisted for more than a few weeks, it's worth getting evaluated.

Does sleeping on one side cause a crooked jaw?

Sleeping on one side consistently can contribute to facial asymmetry over time, but it's unlikely to be the sole cause of a crooked jaw. The pressure from a pillow can affect soft tissue and potentially influence how muscles develop, but it won't reshape bone. If you're concerned, try alternating sides or sleeping on your back — but don't expect this alone to correct existing asymmetry.

Is jaw asymmetry normal?

Yes, some degree of jaw asymmetry is completely normal. Studies using facial scanning technology show that virtually no one has a perfectly symmetric face. Most asymmetry is subtle enough that others don't notice it. It only becomes a medical concern when it exceeds about 5mm, causes functional problems, or worsens over time.

Can braces fix a crooked jaw?

Braces can fix jaw crookedness that's caused by malocclusion — how your teeth fit together. By moving teeth into proper alignment, braces can eliminate the need for your jaw to shift sideways to bite comfortably. However, braces alone cannot change the shape of jaw bones. For skeletal asymmetry, braces are often combined with jaw surgery.

Reviewed and Updated on May 21, 2026 by George Wright