Why Is My Jaw Hurting on One Side? 7 Causes & Relief

One-sided jaw pain is usually caused by temporomandibular joint (TMJ) disorder, teeth grinding, a dental problem, or muscle strain from habits like gum chewing or sleeping on one side—and pinpointing which side hurts can help identify the trigger.

The discomfort you're feeling on the right side or left side of your jaw often signals that something specific is irritating the joint, muscles, or teeth on that side. In most cases, the cause is treatable at home or with a dentist's help, but certain warning signs mean you should seek care quickly.

7 Causes of Jaw Pain on One Side in 2026

The following causes explain why your jaw might be sore on just one side rather than both—each one affects the jaw asymmetrically based on your habits, anatomy, or an underlying condition.

Understanding which cause matches your symptoms is the first step toward relief. Let's break down the most common culprits.

Is It TMJ Disorder (TMD)?

Temporomandibular joint disorder—commonly called TMJ or TMD—is the leading cause of one-sided jaw pain. The temporomandibular joint connects your jawbone to your skull, and you have one on each side of your face. When one joint becomes inflamed, misaligned, or overworked, you'll feel pain concentrated on that side.

TMD symptoms include:
- Clicking or popping when you open your mouth
- Pain that worsens when chewing or yawning
- Jaw stiffness, especially in the morning
- A feeling that your jaw is "stuck" or locked

"TMD affects more than 10 million Americans. The condition is more common in women than men and is most frequently seen in individuals between 20 and 40 years of age." — National Institute of Dental and Craniofacial Research

The side that hurts is typically the side where the joint dysfunction is occurring. Stress, jaw clenching, and arthritis can all contribute to TMD on one side.

Could Teeth Grinding or Clenching Be the Cause?

Bruxism—the medical term for grinding or clenching your teeth—puts enormous pressure on the jaw muscles and joint. Many people grind more heavily on one side, which explains why the pain shows up asymmetrically.

You might not realize you're grinding if it happens during sleep. Signs include:
- Waking up with a sore jaw or headache
- Worn, flattened, or chipped teeth
- Tooth sensitivity without an obvious cavity
- Indentations on the inside of your cheeks

Nighttime bruxism often intensifies during periods of stress, and the side you favor while sleeping may take the brunt of the pressure.

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Do You Have a Dental Problem on That Side?

Tooth infections, cavities, abscesses, and impacted wisdom teeth can all radiate pain into the jaw. Because these issues typically affect one tooth or a cluster of teeth on one side, the jaw pain follows.

Warning signs of a dental cause include:
- Throbbing pain that intensifies with hot or cold foods
- Swelling in the gum or cheek on the affected side
- A visible bump or pus near the gum line
- Fever or a foul taste in your mouth

An abscessed tooth is a dental emergency. Left untreated, the infection can spread to the jawbone or even the bloodstream.

Is It Muscle Strain From Everyday Habits?

Your jaw muscles—particularly the masseter and temporalis—can become strained just like any other muscle in your body. One-sided strain often results from:

The pain from muscle strain tends to feel dull and achy rather than sharp. It often improves with rest and worsens with activity.

Could a Sinus Infection Be to Blame?

Sinus infections—especially those affecting the maxillary sinuses—can cause pain that mimics jaw discomfort. The maxillary sinuses sit just above your upper teeth, and when they become inflamed, the pressure can radiate into the jaw.

You'll know it's likely sinus-related if you also have:
- Nasal congestion or a runny nose
- Facial pressure that worsens when bending over
- Post-nasal drip or a sore throat
- Pain that spans the cheek, eye, and jaw on the same side

Sinus-related jaw pain usually resolves once the infection clears.

Is Trigeminal Neuralgia Causing Sudden Sharp Pain?

Trigeminal neuralgia is a nerve condition that causes sudden, severe, shock-like pain on one side of the face. The trigeminal nerve controls sensation in the face, and when it misfires, the pain can strike the jaw, cheek, or forehead.

Unlike TMD, trigeminal neuralgia produces:
- Brief but intense pain lasting seconds to two minutes
- Episodes triggered by light touch, chewing, speaking, or brushing teeth
- Pain described as electric or stabbing
- No pain between episodes

"Trigeminal neuralgia affects about 12 of every 100,000 people per year. It is more common in adults over 50 and occurs slightly more often in women." — American Association of Neurological Surgeons

This condition requires medical evaluation and is typically managed with medications or, in some cases, surgery.

Did You Experience an Injury or Trauma?

A blow to the face, a fall, a sports injury, or even a minor impact you may have forgotten about can cause bruising, inflammation, or a jaw fracture on one side. If your one-sided jaw pain started after any physical trauma—even something as simple as biting down on something unexpectedly hard—injury may be the cause.

Signs of a possible fracture include:
- Inability to open or close your mouth normally
- Numbness in the chin or lower lip
- Visible bruising or swelling
- Teeth that suddenly don't align correctly

Any suspected jaw fracture requires immediate medical attention.

How to Find Relief at Home

For most causes of one-sided jaw pain—especially TMD, bruxism, and muscle strain—home remedies can provide significant relief within a few days.

Start with these approaches:

Avoid extreme jaw movements and resist the urge to "test" whether the pain is still there by opening wide repeatedly—this prolongs healing.

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When to See a Dentist or Doctor

Most one-sided jaw pain improves within one to two weeks with home care, but certain symptoms signal that you need professional evaluation.

See a dentist if:
- Pain persists beyond two weeks despite home treatment
- You have signs of a tooth infection (swelling, fever, pus)
- Your teeth no longer fit together properly
- You notice new chips, cracks, or wear on your teeth

See a doctor or visit urgent care if:
- Pain is severe and sudden with no obvious cause
- You experience numbness in your face, lip, or tongue
- You cannot open or close your mouth
- You have chest pain, shortness of breath, or arm pain alongside jaw pain (these may indicate a cardiac event)

A dentist may recommend a custom night guard to protect against bruxism, while a doctor may refer you to an oral surgeon or neurologist depending on the suspected cause.

In Short

One-sided jaw pain most commonly results from TMJ disorder, teeth grinding, dental issues, or muscle strain from everyday habits. The specific side that hurts often points to which joint, tooth, or muscle group is affected. Home remedies like ice, heat, soft foods, and jaw rest help most cases resolve within two weeks. See a dentist if you suspect a tooth infection or notice bite changes, and seek medical attention for severe pain, numbness, or symptoms that could indicate a heart problem.

What You Also May Want To Know

Why Is My Jaw Sore on One Side?

One-sided jaw soreness typically indicates that something is specifically affecting that side—whether it's a TMJ problem, muscle overuse from chewing habits, a dental issue like an abscess or impacted wisdom tooth, or even sleeping position. The asymmetry of the pain is your body telling you where the problem originates. If the soreness is dull and achy, muscle strain or TMD is more likely. If it's sharp or throbbing, a dental or nerve issue may be the cause.

Why Is My Jaw Hurting on the Right Side Specifically?

The right side is no more inherently prone to jaw problems than the left. Right-sided jaw pain usually means the issue—whether TMD, bruxism, infection, or injury—is localized to that side. Consider your habits: do you chew more on the right, sleep on your right side, or cradle your phone on your right shoulder? These behaviors can contribute to right-sided jaw strain. A dental examination can reveal whether a tooth on that side is the culprit.

Can Stress Cause Jaw Pain on One Side?

Yes. Stress is a major contributor to jaw clenching and teeth grinding, often without your awareness. When stressed, people tend to hold tension in their facial muscles and clench their jaw, which strains the TMJ and surrounding muscles. If you habitually clench harder on one side—or sleep on one side while grinding—the pain will manifest asymmetrically. Stress management techniques and a night guard can help break this cycle.

Should I Be Worried About One-Sided Jaw Pain?

Most one-sided jaw pain isn't dangerous and resolves with conservative treatment. However, you should take it seriously if you have fever, facial swelling, inability to open your mouth, or numbness—these could indicate infection or nerve involvement. Additionally, jaw pain that radiates to the chest, arm, or shoulder (especially with sweating or shortness of breath) can be a sign of a heart attack, particularly in women, and requires emergency evaluation.

How Long Does TMJ Pain Last?

TMJ pain varies widely depending on the cause and treatment. Mild TMD from temporary muscle strain may resolve in a few days with rest. Chronic TMD from ongoing bruxism or joint damage can last weeks to months without intervention. Most people see improvement within two to four weeks when following a soft diet, applying heat or ice, and avoiding jaw strain. If symptoms persist beyond a month, professional treatment—such as physical therapy, a custom splint, or dental work—is typically recommended.

Reviewed and Updated on May 15, 2026 by George Wright