Temporomandibular joint disorders

Overview

Temporomandibular joint disorders (often called TMJ disorders) are problems with the joint that connects your jawbone to your skull, just in front of your ears. This joint acts like a hinge and allows you to open and close your mouth, chew, talk, and yawn. When something goes wrong with this joint or the muscles around it, you may feel pain, clicking, or trouble moving your jaw.

Yes, TMJ disorders are fairly common. Many people experience mild symptoms at some point in their lives, though not everyone seeks medical help.

TMJ disorders can affect anyone, but they are most common in adults between 20 and 40 years old. Women are affected more often than men. They can also occur in children and older adults, often for different reasons.

Symptoms

Common symptoms

• Pain or tenderness in your jaw, especially near the joint in front of your ear
• Aching pain in your face, neck, or shoulders
• Clicking, popping, or grating sounds when you open or close your mouth
• Difficulty or discomfort when chewing
• Locking of the jaw – it gets stuck open or closed
• Headaches or earaches without an infection

Symptoms in children

• Complaints of jaw pain or headache, especially after chewing or yawning
• Ear pain without infection
• Clenching or grinding teeth at night (often noticed by parents)
• Trouble opening the mouth wide for eating or brushing teeth

Symptoms in older adults

• Pain or stiffness in the jaw joint, often linked to arthritis
• Clicking or grinding sounds that may be softer than in younger people
• Difficulty chewing due to joint wear and tear
• Limited jaw movement that can interfere with eating or speaking

Causes

Main causes

• Teeth grinding or clenching (bruxism), often during sleep or when stressed
• Injury to the jaw or joint, such as from a fall or accident
• Arthritis in the jaw joint – this can be osteoarthritis or rheumatoid arthritis
• Misalignment of the teeth or jaw (bite problems)
• Stress, which can cause you to tighten your jaw muscles without realising it
• Certain habits like chewing gum a lot or biting your nails

Risk factors

• Being a woman – hormones may play a role
• Having a job or hobby that requires long periods of jaw tension (like singing or playing a wind instrument)
• Poor posture, especially holding your head forward for long hours
• History of previous jaw injury
• Connective tissue disorders that affect joints throughout the body

When to see a doctor

See a doctor urgently if:

• Your jaw is locked and you cannot open or close your mouth
• You have severe pain after an injury to your face or jaw
• You notice swelling, redness, or warmth over your jaw joint that spreads

Book a routine appointment if:

• Jaw pain or clicking that lasts more than a week and does not get better with rest or self-care
• Frequent headaches or earaches that you think are linked to your jaw
• Difficulty chewing or opening your mouth fully
• You hear popping sounds that bother you or get worse over time

Diagnosis

Your doctor or dentist will start by asking about your symptoms and examining your jaw. They will press on the joint and the muscles around it, listen for clicking sounds when you open and close your mouth, and check how wide you can open. They may also look at your teeth and bite pattern.

Tests that may be done

• X-rays of your jaw to check the joint and rule out other problems
• CT scan (a detailed X-ray) if more images are needed of the bone
• MRI scan (uses magnetic fields) to see the soft tissues of the joint, like the disc that cushions the joint
• In some cases, a bite evaluation or sleep study if teeth grinding is suspected

What to expect at your appointment

Most people can be diagnosed based on the physical exam and history alone. Imaging is not always needed. The doctor might ask you about your habits (like chewing gum, stress, or teeth grinding) and any recent injuries. They will also want to rule out other causes of facial pain, such as sinus problems or dental issues.

Treatment

Treatment for TMJ disorders usually starts with simple self-care and lifestyle changes. Many people feel better within a few weeks without any medical treatment. If symptoms persist, your doctor may recommend non-surgical treatments. Surgery is rarely needed and only considered when other options have not worked.

Self-care at home

• Eat soft foods like yoghurt, scrambled eggs, soup, and smoothies to rest your jaw
• Avoid hard, crunchy, or chewy foods (like nuts, raw carrots, chewing gum, or tough meat)
• Apply an ice pack to the painful area for 10–15 minutes several times a day, especially after activity
• After a couple of days, if the pain is less sharp, try a warm compress to relax the muscles
• Do gentle jaw stretching exercises: slowly open and close your mouth a few times, or move your jaw gently from side to side – but stop if it hurts
• Try not to clench your jaw – keep your teeth slightly apart when your mouth is at rest
• Reduce habits like nail biting, chewing pens, or resting your chin on your hand

Medical treatments

If self-care is not enough, your doctor or dentist may recommend a mouth guard (also called a splint) to wear at night to prevent grinding. They might also suggest physiotherapy with exercises to strengthen and relax the jaw muscles. Pain relief medications, such as nonsteroidal anti-inflammatory drugs (NSAIDs), can be used for short periods – always follow the advice of your healthcare provider. In some cases, your doctor may offer a muscle relaxant or a low dose of antidepressant to help with pain and muscle tension. These are not specifically for your mood but to affect how your body processes pain and tension. Always talk to your doctor before taking any medication.

When is surgery considered?

Surgery for TMJ disorders is uncommon and usually only considered when other treatments have not helped after several months, or if there is a clear structural problem with the joint that can be fixed. Examples include arthrocentesis (flushing the joint), arthroscopy (a small camera to see inside the joint), or in rare cases, open-joint surgery. Your doctor will discuss the risks and benefits with you if surgery might be an option.

Living with this condition

Living with a TMJ disorder often means making small changes to protect your jaw. Pay attention to how you use your jaw throughout the day. Avoid opening your mouth too wide when yawning – support your chin with your hand. When eating, take small bites and chew slowly. Try to keep your teeth apart when your mouth is at rest to avoid clenching. If you tend to grind your teeth at night, a mouth guard can help protect your joint.

Lifestyle tips

• Manage stress through relaxation techniques like deep breathing, meditation, or gentle yoga – stress often makes jaw clenching worse
• Practice good posture – keep your head aligned over your shoulders, especially when using a computer or looking at your phone
• Avoid habits that strain your jaw, like chewing on pens, ice, or your fingernails
• Get enough sleep – fatigue can increase muscle tension and clenching

Diet and exercise

A soft-food diet is very helpful during a flare-up. Choose foods like oatmeal, mashed potatoes, pasta, cooked vegetables, and fish. Avoid very cold or very hot foods if they trigger pain. As your symptoms improve, you can slowly add more foods back, but still avoid tough or chewy items. Gentle jaw exercises recommended by a physiotherapist can help maintain movement and reduce stiffness. Avoid heavy chewing or wide opening until the pain subsides.

Mental health and emotional wellbeing

Chronic jaw pain can be frustrating and may affect your mood, sleep, and ability to enjoy meals or conversations. It is normal to feel anxious or down when pain does not go away quickly. Talk to your doctor if you feel the condition is affecting your mental health. They can connect you with support services. Remember that most TMJ disorders improve, and you are not alone.

Prevention

It may not always be possible to prevent TMJ disorders, but you can reduce your risk by avoiding habits that strain your jaw. Try not to chew gum excessively or bite your nails. Practice good posture, especially when sitting at a desk. If you are prone to stress, find ways to relax – stress often leads to clenching. If you grind your teeth at night, a dentist can make a mouth guard to protect your joint. Regular dental check-ups can also help catch bite problems early.

Screening programmes

There is no routine screening test for TMJ disorders. If you have symptoms, see your doctor or dentist for an evaluation.

Complications

If left untreated

• Chronic pain in the jaw, face, neck, or shoulders that does not go away
• Limited ability to open your mouth (trismus), which can make eating, speaking, and dental care difficult
• Worsening of teeth grinding (bruxism) that can damage your teeth or cause tooth sensitivity
• Joint damage over time, including wearing down of the cartilage disc inside the joint
• Headaches or migraines that occur more often

Long-term outlook

For most people, TMJ disorders improve with simple self-care and lifestyle changes. Even if symptoms last longer, non-surgical treatments are usually effective. Surgery is rarely needed, and the outlook is generally good. With the right support and patience, most people can return to their normal activities without significant pain.

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