Why Does My Jaw Click? Causes & Treatment

Introduction

If you have ever noticed a clicking or popping sound when you open your mouth, you are certainly not alone. A jaw click when opening the mouth is one of the most common concerns patients raise with their dentist, and it is understandable that it can feel worrying — particularly if it is accompanied by discomfort or difficulty chewing.

Many people turn to online searches to understand what might be causing their jaw to click, whether it is something to be concerned about, and what options may be available to help. It is a sensible first step, though it is always worth remembering that online information should complement rather than replace a professional dental assessment.

In this article, we will explore the common reasons behind jaw clicking, explain the anatomy of the jaw joint, discuss the signs and symptoms that may accompany this issue, and outline when it may be appropriate to seek a clinical evaluation. Whether your jaw clicks occasionally or has become a persistent concern, understanding the possible causes can help you make informed decisions about your oral health.

Why Does My Jaw Click? A Quick Answer

Why does my jaw click when I open my mouth?

A jaw click when opening the mouth is most commonly associated with the temporomandibular joint (TMJ). It often occurs when the small disc of cartilage within the joint shifts slightly out of its normal position. This may be caused by habits such as teeth grinding, jaw clenching, stress, or bite misalignment. In many cases, occasional jaw clicking is not harmful, but persistent clicking accompanied by pain or restricted movement should be assessed by a dental professional.

What Is the Temporomandibular Joint (TMJ)?

To understand why your jaw clicks, it helps to know a little about the joint responsible for jaw movement. The temporomandibular joint (TMJ) is located on each side of your head, just in front of your ears. It connects your lower jaw (mandible) to your skull and allows you to open and close your mouth, chew, speak, and yawn.

Inside the TMJ, there is a small disc made of cartilage that acts as a cushion between the bones of the joint. This disc helps the jaw move smoothly. Muscles, ligaments, and tendons surrounding the joint all work together to coordinate jaw movement.

When everything functions correctly, the jaw moves without any unusual sounds. However, when the disc becomes displaced, the surrounding muscles become tense, or the joint surfaces experience wear, the result can be clicking, popping, or even a grating sensation. Problems affecting the TMJ are collectively known as temporomandibular disorders (TMD), and they can range from mild and temporary to more persistent conditions that benefit from clinical management.

Common Causes of Jaw Clicking

There are several reasons why your jaw may click when you open your mouth. Understanding the potential causes can help put your mind at ease and identify whether further investigation might be helpful.

Disc Displacement

The most frequent cause of jaw clicking is a slight displacement of the cartilage disc within the TMJ. When the disc moves out of its usual position, it can create a clicking or popping sound as the jaw opens or closes. In many cases, the disc repositions itself during movement, which is why the click often occurs at a specific point during opening.

Teeth Grinding and Jaw Clenching (Bruxism)

Habitual grinding or clenching of the teeth — often during sleep — places significant pressure on the TMJ and surrounding muscles. Over time, this can contribute to joint wear, muscle fatigue, and clicking sounds. Many people are unaware they grind their teeth until a dentist identifies signs of wear on the tooth surfaces.

Stress and Muscle Tension

Stress can lead to increased tension in the jaw muscles, which may alter how the joint moves. Sustained muscle tightness can affect the alignment and function of the TMJ, potentially resulting in clicking or discomfort.

Bite Misalignment (Malocclusion)

If the upper and lower teeth do not meet evenly, it can place uneven strain on the jaw joint. This imbalance may contribute to TMJ dysfunction over time.

Arthritis or Joint Degeneration

In some cases, conditions such as osteoarthritis can affect the TMJ, leading to changes in the joint surfaces that produce clicking or grating sounds.

Symptoms That May Accompany Jaw Clicking

Jaw clicking on its own — particularly if it is painless and occasional — is quite common and may not necessarily indicate a significant problem. However, some people experience additional symptoms alongside the clicking, which may suggest a temporomandibular disorder worth investigating further.

Symptoms that sometimes accompany jaw clicking include:

Jaw pain or tenderness, particularly around the joint area or in the muscles of the face
Difficulty opening the mouth fully, or a sensation that the jaw is catching or locking
Pain whilst chewing or a feeling of fatigue in the jaw after eating
Earache or a sensation of fullness in the ear, even without an ear infection
Headaches, particularly around the temples
A change in how the teeth fit together when biting down

These symptoms can vary in severity from person to person. Some individuals may experience them intermittently, whilst others may find them more persistent. If you notice any of these symptoms alongside jaw clicking, it may be worthwhile to discuss them with your dentist during your next appointment.

The Science Behind TMJ Disorders

The temporomandibular joint is one of the most complex joints in the body. Unlike simpler hinge joints, the TMJ combines both rotational and sliding movements, allowing the wide range of motion needed for everyday activities such as speaking, chewing, and yawning.

The articular disc — the small piece of cartilage sitting between the condyle (the rounded end of the lower jaw bone) and the temporal bone of the skull — plays a crucial role in smooth joint function. It absorbs shock, distributes pressure, and prevents the bones from rubbing directly against each other.

When this disc becomes displaced — a condition sometimes referred to as internal derangement — the normal mechanics of the joint are disrupted. As the jaw opens, the condyle may need to move over or around the displaced disc, producing the characteristic click. In some cases, the disc may return to its correct position during opening (a "reducing" displacement), whilst in others it may remain displaced (a "non-reducing" displacement), which can lead to restricted jaw movement.

The muscles of mastication — including the masseter, temporalis, and pterygoid muscles — also play an important role. When these muscles become overworked or develop trigger points due to clenching or stress, they can contribute to pain, altered jaw movement, and joint sounds.

Understanding this interplay between the disc, bones, and muscles helps explain why TMJ disorders can present in different ways and why treatment approaches may vary depending on the underlying cause.

How Jaw Clicking May Be Assessed

If jaw clicking is causing concern — particularly if it is accompanied by pain, restricted movement, or other symptoms — a dental professional can carry out a thorough assessment to better understand what may be contributing to the issue.

A clinical assessment for jaw clicking typically involves:

A detailed history of your symptoms, including when they started, what makes them better or worse, and whether you have any habits such as teeth grinding
A physical examination of the jaw joint, including palpation of the joint and surrounding muscles to check for tenderness or dysfunction
Assessment of jaw movement, including how wide you can open your mouth and whether the jaw deviates to one side during opening
An evaluation of your bite, to identify any misalignment that may be contributing to uneven joint loading
Imaging, such as X-rays or, in some cases, an MRI scan, to visualise the joint structures and disc position

This comprehensive approach helps the dental team build a clear picture of what may be happening within the joint and guides any recommendations for management. If you are experiencing persistent symptoms, your dentist may discuss this during a general dental consultation to determine the most appropriate next steps for your individual situation.

Treatment Approaches for Jaw Clicking and TMJ Disorders

Treatment for jaw clicking and TMD depends on the underlying cause, the severity of symptoms, and the findings of a clinical examination. In many cases, conservative management is effective, and more invasive approaches are rarely needed.

Self-Care and Lifestyle Adjustments

For mild or intermittent jaw clicking, simple self-care measures can often help:

Eating softer foods to reduce strain on the jaw joint
Avoiding excessive jaw movements, such as wide yawning or chewing gum
Applying a warm compress to the jaw area to ease muscle tension
Practising relaxation techniques to reduce stress-related clenching

Bite Splints and Mouth Guards

If bruxism (teeth grinding) is a contributing factor, a custom-made bite splint or mouth guard may be recommended. These devices are worn — typically at night — to cushion the teeth, reduce grinding forces, and help relax the jaw muscles. They are designed to fit precisely and are generally well tolerated.

Physiotherapy and Jaw Exercises

Targeted exercises can help improve jaw mobility, strengthen the surrounding muscles, and promote better joint function. A dental professional or physiotherapist with experience in TMJ disorders can guide patients through appropriate exercises.

Orthodontic or Restorative Considerations

In cases where bite misalignment is contributing to TMJ dysfunction, orthodontic treatment may be considered as part of a broader management plan. Correcting the alignment of the teeth can help distribute biting forces more evenly, potentially reducing strain on the joint.

It is important to note that treatment suitability depends entirely on individual clinical findings, and there are no guaranteed outcomes from any intervention.

When Professional Dental Assessment May Be Needed

Occasional, painless jaw clicking is very common and does not always require treatment. However, there are certain situations where seeking a dental evaluation would be sensible.

You may wish to arrange a dental appointment if you experience:

Persistent jaw clicking that occurs regularly over several weeks
Pain in the jaw joint, face, or ear that does not resolve with self-care measures
Difficulty opening or closing your mouth, or a feeling that the jaw is locking in position
Jaw clicking accompanied by headaches or neck pain
A noticeable change in your bite, where your teeth feel as though they no longer fit together properly
Jaw pain following dental treatment or trauma, such as a knock to the face

These symptoms do not necessarily indicate a serious condition, but they do suggest that a professional assessment could be beneficial. A dentist can examine the joint, identify any contributing factors, and discuss appropriate options tailored to your needs. Early assessment often means that simpler management approaches can be effective.

Why Does My Jaw Click When I Open My Mouth?