Waking up with sharp discomfort on only one side of your face can disrupt your entire day. This specific symptom often makes it hard to chew, speak, or open your mouth comfortably.

To find relief, you must understand the key differences between these potential sources of facial discomfort. Let’s explore the most common causes of jaw pain on one side to help you determine what might be triggering your symptoms.

Common causes of jaw pain on one side

When you feel jaw pain on one side, finding the root cause is the first step to relief. This symptom can stem from multiple areas, including your joints, muscles, teeth, or sinuses. Because these structures sit close together, a problem in one area often sends pain signals to nearby tissues.

TMJ disorders and joint strain

Temporomandibular disorders, or TMDs, are a primary cause of jaw pain on one side. TMDs represent a group of more than 30 conditions that cause pain and dysfunction in the jaw joint and muscles that control jaw movement. You have two of these joints, one on each side of your face. When one joint is strained or injured, you may feel deep pain, joint stiffness, or clicking sounds when you chew. To better understand how these issues develop, you can read about TMJ symptoms to check your joint health.

Dental issues and infections

Problems with your teeth or gums are another frequent source of one-sided discomfort. A deep cavity, a cracked tooth, or a dental abscess can cause intense, throbbing pain that stays on one side of your lower face. An abscess is a serious infection at the root of a tooth that needs quick care from a dentist. This kind of pain can feel like it spreads through the whole jaw bone, making it hard to find the exact tooth that hurts.

Bruxism and muscle fatigue

Clenching or grinding your teeth is known as bruxism. Many people grind their teeth at night without knowing it, which puts immense pressure on the teeth and muscles on just one side. This constant physical stress fatigues the chewing muscles, leading to a dull ache when you wake up. Understanding the differences between bruxism and TMJ differences can help you identify if teeth grinding is the main cause of your pain.

Sinusitis and referred pain

Your nasal sinuses sit right above your upper teeth. When you get a sinus infection, or sinusitis, fluid can build up and cause pressure on one side of your face. This pressure can press down on the nerves that go to your upper teeth and jaw joint, creating referred pain. This means your brain feels the pain in your jaw even though the problem is actually in your sinuses.

When unilateral jaw pain signals TMJ disorder vs. dental problems

When you feel pain on only one side of your jaw. It is important to determine whether the source is your temporomandibular joint (TMJ) or a specific dental problem. Understanding this difference helps you seek the right care from the right specialist. Read our TMJ disorder overview to learn more about how jaw joint issues present clinically.

How to find joint and muscle pain

People have two temporomandibular joints, with one on each side of the jaw. Pain in the chewing muscles or the joint itself is the most common symptom of a temporomandibular disorder. According to the National Institute of Dental and Craniofacial Research, these disorders cover more than 30 conditions that cause pain and dysfunction. Joint pain often comes with jaw stiffness, a limited range of motion, or a locked jaw. You may also hear painful clicking, popping, or grating sounds when you open or close your mouth.

A study of patients with unilateral pain found a strong link between jaw pain on one side and painful palpation of the joint. The same study showed that one-sided pain is closely tied to fluid buildup, known as effusion, inside the joint. Joint issues can also occur alongside headaches, back pain, and sleep problems. If your pain spreads to your neck and face or gets worse when you chew, the joint is likely the source.

Signs of a dental issue

Dental problems usually cause sharp, highly localized pain on one side of your mouth. A cracked tooth, deep decay, or a dental abscess can make one specific spot very sore. This type of pain often flares up when you bite down or touch the tooth. It also tends to react strongly to hot or cold foods and drinks. Unlike joint pain, dental pain does not typically affect how wide you can open your mouth. It also does not cause clicking or popping in your jaw joint. If you can point to one tooth as the source of your discomfort, you likely need a dentist to treat a tooth infection or structural damage.

Symptom	More Likely TMJ Disorder	More Likely Dental Issue
Pain location.	Spread across jaw joint and cheek.	Pointed to one specific tooth.
Pain with hot or cold.	Rare.	Common (sensitive tooth).
Clicking or popping sound.	Common, especially when painful.	Rare.
Limited mouth opening.	Common (stiff joint).	Uncommon.
Pain when chewing.	Yes, especially with tough foods.	Yes, when biting on the affected tooth.
Facial swelling.	Rare.	Possible with abscess.

The three finger test for jaw movement

You can use a simple screening tool at home to check your jaw function. This is called the three-finger test. Try to open your mouth wide enough to fit three of your fingers vertically between your front teeth. If you cannot do this due to pain, joint stiffness, or a physical block, it points to a jaw joint issue rather than a standard toothache. This limited movement suggests that the joint or the surrounding muscles are tight or inflamed, which warrants a specialized evaluation.

Red flags: jaw pain that requires urgent evaluation

While most jaw discomfort stems from muscles or joints, some symptoms point to serious conditions. When TMJ symptoms or minor dental issues do not explain your pain, you may need immediate care. Knowing the warning signs can help you seek treatment quickly to prevent severe complications.

Cardiac warnings and vascular events

Jaw pain can sometimes signal a dangerous heart event. According to the Cleveland Clinic, a sudden or severe ache on one side of your face can indicate a cardiac issue. When your heart does not get enough blood flow, nerves can transmit pain signals up to your face and neck. If you have jaw pain along with chest pressure, shortness of breath, or sweating, seek emergency care right away.

Infection and restricted opening

A severe dental or bone infection can also cause one-sided face pain. Watch for signs like high fever, rapid facial swelling, or trouble swallowing. Another critical sign is trismus, or lockjaw, where you cannot open your mouth. The Mayo Clinic advises seeking immediate medical attention if you cannot open or close your jaw completely. Untreated infections in this area can spread to other parts of the body.

Progressive neurologic symptoms

Numbness, tingling, or weakness in your face can point to a nerve problem rather than joint strain. When nerve paths are compressed or damaged, they can cause burning or stabbing pain on one side of your jaw. If facial numbness spreads or you notice new muscle droop, schedule a prompt evaluation. These symptoms warrant a specialized diagnostic exam to find the root cause and protect your nervous system.

How jaw pain on one side is diagnosed

Finding the cause of jaw pain on one side requires a careful, step-by-step review by a specialist. Dr. Michael Simmons and his team in Encino use precise clinical methods and advanced dental technology to evaluate your jaw joint and facial muscles. This thorough process helps find whether your pain stems from a joint issue, muscle strain, or dental trouble.

Clinical examination of the jaw

The first part of your visit focuses on how your jaw moves and feels. A specialist will examine your jaw joints and muscles to find the exact source of your pain. This step helps rule out other facial pain conditions.

1. Physical palpation of the joint and muscles: The specialist will gently press on your jaw joints and chewing muscles while your mouth is closed and open. A clinical study of eighty-five patients with one-sided jaw pain showed a strong link between the side of the pain and joint tenderness during physical exam (PubMed, 2001).
2. Range of motion testing: The specialist will measure how wide you can open your mouth and how well your jaw moves from side to side.
3. The three-finger test: You will be asked to place three of your fingers vertically between your front teeth. If you cannot do this, it suggests a restricted range of motion or joint stiffness. You can read more about how to track your joint mobility on our TMJ symptoms checklist.
4. Listening for joint sounds: The specialist will listen to your jaw joints as you open and close. They will check for clicking, popping, or grating sounds. While painless sounds are common and normal (National Institute of Dental and Craniofacial Research), sounds accompanied by pain indicate a joint issue.

Advanced diagnostic imaging

To confirm what is happening inside the joint, specialists use targeted imaging tools. These scans show the bones and soft tissues of your jaw in clear detail. They help ensure you get the right care for your needs.

1. Panoramic X-ray: This basic scan provides a full view of your teeth, jawbone, and joints to check for obvious bone damage or dental issues.
2. Cone beam computed tomography: Also known as a CBCT scan, this tool creates highly detailed 3D images of your jaw bones to check for wear or joint damage.
3. Magnetic resonance imaging: An MRI is used to check soft tissues like the cartilage disk and ligaments. Research shows a strong link between unilateral jaw pain and joint fluid build-up, called effusions, on an MRI (PubMed, 2001). Interestingly, the same study found no link between the side of your pain and disk displacement.

Treatment paths based on the underlying cause

When you have jaw pain on one side, your care plan must focus on the specific source of your pain. Dr. Michael Simmons, DMD, Director, and our team use a careful, step-by-step path to relieve your discomfort. We start with the most gentle, non-invasive therapies before considering stronger medical options.

Conservative first-line care

For most people, simple home care and minor lifestyle changes are enough to ease jaw strain. Applying gentle heat or cold packs to the side of your face can help relax tense muscles. Eating a soft-food diet for a few weeks reduces the heavy work your jaw joint must do. Over-the-counter pain relievers can also provide short-term comfort while your muscles heal. Research shows that physical therapy for the jaw and self-managed home care can be highly effective in treating TMJ symptoms. Our team often recommends targeted physical therapy to stretch and strengthen your jaw muscles.

Custom oral appliances

If teeth grinding or clenching during sleep causes your unilateral jaw pain, a custom mouth guard or splint can help. These specialized oral appliances are designed to keep your teeth apart and protect your joint from physical stress. A custom-fit device from a specialist ensures your jaw rests in its natural, comfortable position. This treatment is a key part of our jaw pain treatment options in Encino, helping to prevent muscle fatigue and joint damage.

Advanced medical therapies

For pain that does not improve with conservative care, we offer advanced treatment options. Contracted muscle fibers, or trigger points, can develop in your jaw and cause constant discomfort. We can treat these refractory cases with trigger point injections to help the muscles relax. In some cases, intra-articular injections directly into the joint can help reduce swelling and pain. We only consider surgical treatment as a last resort when all non-surgical steps have failed to give you relief.

A team approach to care

Your jaw health is closely linked to your dental health, breathing, and general well-being. That is why our practice uses a multidisciplinary approach to care. Dr. Simmons works closely with sleep physicians, ENT specialists, and oral surgeons to ensure you get the right care. If you are struggling with persistent pain, we can help you find the right path forward. Call (818) 300-0070 to schedule a consultation at our Encino office today.

Frequently Asked Questions

Why does my jaw hurt on only one side?

According to the National Institute of Dental and Craniofacial Research, pain on one side of your jaw is often due to a temporomandibular disorder. These conditions affect the joint and muscles on that side. Other common causes include a cracked tooth, a dental infection, or a sinus infection. A clinical exam can find the exact cause.

Can a bad tooth cause jaw pain on one side?

Yes, a dental problem like a deep cavity, cracked tooth, or abscess can cause severe jaw pain on one side. When a tooth is infected, the pain can spread to the nearby jaw bone and muscles. If you have a toothache, fever, or swelling along with your jaw pain, you should see a dentist to check for an infection.

How long does one-sided jaw pain last?

The National Institute of Dental and Craniofacial Research states that many jaw joint and muscle issues last only a short time and go away on their own. However, some cases can become chronic or long lasting. If your pain does not improve after a week, or if it gets worse, you should seek professional evaluation.

When is jaw pain on one side an emergency?

According to the Cleveland Clinic, you should talk to a healthcare provider if your pain lasts more than a week. You need urgent medical care if you have jaw pain with chest pain, shortness of breath, or dizziness, as these can signal a heart event. Sudden lockjaw or a high fever also require immediate care.

Ready to schedule a consultation for your jaw pain?

Ignoring jaw pain on one side can lead to worse problems like joint wear or lockjaw over time. Getting an early checkup helps find the true cause before simple eating and talking become hard to do. You can get a clear answer and a plan that fits your exact needs from a trained specialist. Our team is here to help you find lasting comfort and protect your joint health.

Ready to schedule a consultation? Call (818) 300-0070 to schedule a consultation.