Discomfort in the Jaw Joint Area: Causes and Diagnosis

Pain in the jaw area near the ear may arise from tooth ailments, dysfunction of the temporomandibular joint, overexertion of the chewing muscles, otitis, inflammation of the salivary gland, neuralgia, or trauma. If it intensifies during chewing and is accompanied by clicking or restricted movement, the cause may be joint dysfunction. A tooth's reaction to cold and hot, pain when biting, and swelling of the gums more often indicate a dental problem.

If the jaw near the ear hurts, it is advisable to reduce the load on it before examination, switch to soft food, avoid chewing gum, and refrain from forcibly opening the mouth. In the case of rapid swelling, high fever, pus, trauma, jaw locking, difficulty swallowing, or breathing, urgent medical assistance is needed.

How to Understand That It Is the Jaw That Hurts, Not the Ear?

The temporomandibular joint is located directly in front of the external auditory canal. Due to this proximity, joint pain can easily be confused with ear pain.

Signs that the source of pain may be the joint or the masticatory muscles include:

• increased discomfort while chewing, yawning, or talking;
• pain when opening the mouth wide;
• clicking, popping, or a grinding sensation in the joint;
• stiffness and fatigue of the masticatory muscles;
• deviation of the lower jaw to the side during movement;
• periodic limitation of mouth opening.

When the jaw hurts but there is no blockage, discharge, or hearing loss, a likely cause is a dental or joint issue. Otitis is more often accompanied by pain inside the ear, hearing impairment, noise, and sometimes fever. However, differential diagnosis of these conditions can only be carried out during an examination.

What Can Cause Jaw Pain Near the Ear

The causes may include:

• dental and gum diseases;
• joint dysfunction;
• bruxism;
• muscle spasm;
• injury;
• otitis;
• inflammation of the parotid salivary gland;
• arthritis;
• trigeminal neuralgia.

If the jaw hurts on the left side, this only indicates the localization of sensations but does not define a diagnosis. The doctor checks the teeth and gums on that side, the condition of the masticatory muscles, joint mobility, and the symmetry of mouth opening. Unilateral pain can also occur with otitis, inflammation of the salivary gland, injury, or neuralgia.

Inflammation of the parotid salivary gland is often accompanied by swelling in front of or under the ear, pain during eating, dryness, or an unpleasant taste in the mouth. Increased swelling during eating may indicate impaired saliva drainage.

Trigeminal neuralgia primarily manifests as brief attacks of sharp pain, similar to an electric shock. These may be provoked by touch, washing, talking, tooth brushing, or chewing. Discomfort can also be caused by a bruise, dislocation, or fracture. The variety of possible conditions explains why the jaw hurts near the ear and why diagnosis should precede treatment.

Is the Cause Always a Tooth?

Severe caries, pulpitis, inflammation near the root, abscess, or problematic wisdom teeth can cause pain that radiates to the ear, temple, and jaw. Signs indicating a dental origin of the problem include the reaction of a specific tooth to hot or cold, pain when biting, swollen gums, pus, unpleasant taste, or swelling of the cheek.

Sometimes a patient finds it difficult to understand which specific tooth is bothering them, especially if the inflammation is located in the area of the molars. Therefore, during the examination, the dentist checks the reaction of the teeth to irritants, biting, and tapping, assesses the condition of the gums, and may recommend radiological studies.

If no dental source is found, the doctor evaluates the condition of the joints and masticatory muscles or recommends a consultation with another specialist.

What Is Temporomandibular Joint Dysfunction?

The temporomandibular joint (TMJ) is a paired articulation that connects the lower jaw to the temporal bones of the skull. Inside each joint is a disc that helps the head of the lower jaw to move smoothly when opening and closing the mouth. Ligaments and masticatory muscles are also involved in the function of this system.

TMJ dysfunction can involve the joint surfaces, disc, or muscles. Its manifestations include pain in front of the ear, stiffness, strange sounds, change in the movement trajectory, limitation of mouth opening, and periodic jaw locking.

Factors that may contribute to the emergence of symptoms include bruxism, the habit of grinding teeth, prolonged chewing of gum, muscle overload, trauma, inflammatory, or degenerative changes. However, it is impossible to determine the mechanism of the disorder based on a single symptom.

Why Does Pain Worsen While Chewing?

During chewing, the joints perform synchronized movements, and the masticatory muscles contract repeatedly. If the tissues are irritated or overloaded, repetitive movements exacerbate discomfort. This is especially noticeable when consuming hard food, large pieces, nuts, and crackers.

When the jaw hurts upon opening the mouth, the doctor evaluates not only the amplitude but also the trajectory of movement. Deviation of the chin to the side, sharp limitation, or locking may accompany disc displacement, muscle spasm, injury, or inflammation. It is not advisable to forcibly open the mouth or "exercise" the joint on your own.

Furthermore, discomfort while chewing can arise from a tooth fracture, pulpitis, or inflammation of the tissues around the root. If it hurts to bite down on a specific tooth, you should inform your dentist about it.

When Should You Seek Emergency Assistance?

Seek help urgently if:

• the pain occurred after a strong blow or fall;
• the face has become asymmetrical or the bite has suddenly changed;
• it is impossible to open or close the mouth normally;
• the swelling rapidly increases or spreads to the neck;
• there are high fever, pus, or marked weakness;
• it has become difficult to swallow, talk, or breathe.

Emergency dental assistance is needed for severe tooth pain with swelling, suspicion of an abscess, bleeding, or acute trauma to the teeth and jaws. If breathing or swallowing is difficult, do not wait for a scheduled visit; seek a dentist immediately.

Additionally, sudden jaw pain along with discomfort in the chest, shortness of breath, cold sweat, nausea, or weakness may have a non-dental origin. In such cases, call emergency services immediately.

What Examinations Can Help Find the Cause of Pain?

Diagnosis begins with taking a history and clinical examination. The doctor clarifies when symptoms appeared, what provokes them, how long the attacks last, whether there have been injuries, dental interventions, nighttime grinding, or joint diseases. Then they examine the teeth and gums, palpate the masticatory muscles and the area of the joints, assess the bite, amplitude, and trajectory of movements.

Imaging is ordered based on the suspected cause. A targeted X-ray helps evaluate a specific tooth, while a panoramic X-ray assesses dental arches, jaws, and the overall condition of the bony structures. Computed tomography allows for the creation of a three-dimensional image and provides comprehensive diagnostic information for planning dental treatment.

CBCT (cone beam computed tomography) shows hard tissues but does not replace other methods. To evaluate the joint disc and surrounding soft tissues, the doctor may recommend MRI. T-Scan is used for a digital analysis of the sequence and strength of contacts between the teeth, but its results are evaluated together with the examination.

For signs of otitis, salivary gland disease, neuralgia, or arthritis, consultations with appropriate specialists are needed. Blood tests, ultrasound, and other investigations are prescribed based on clinical indications.

What Can You Do Before Visiting the Doctor?

If you are trying to figure out what to do when your jaw hurts, first temporarily reduce the load. Choose soft foods, cut them into small pieces, avoid chewing gum, do not bite hard products, and do not open your mouth too wide. Try not to grind your teeth. At rest, your lips may be closed, but your upper and lower teeth should not constantly contact each other.

Do not rest your chin on your hand or hold your phone between your shoulder and head. If there are no contraindications, you can take an over-the-counter pain reliever allowed for you according to the instructions. Do not combine medications with the same active ingredient and do not increase the dose due to insufficient effect.

Do not apply heat to the area if the cause of the pain is unknown, there is swelling, fever, or suspicion of infection. Avoid massaging the swelling, trying to reposition the jaw, and do not buy a ready-made mouth guard without a prescription. However, keep in mind that home remedies may temporarily reduce discomfort but do not eliminate the source of it.