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How does the jaw work?
The mandible, or lower jaw bone, joins the skull in front of each ear. The temporomandibular joints and chewing muscles allow mouth opening, chewing and speech. Both sides work together.
Temporomandibular disorders, abbreviated TMD and often called CMD in German, cover several problems. Some mainly affect muscles, others the joint. The term does not describe one disease or the cause of every head and neck symptom.
Chapter sources [1]
Understand the picture
Joints, muscles and teeth have different roles
Joint
It connects the lower jaw to the skull in front of the ear.
Muscles
They help with opening and chewing.
Teeth
Clenching or grinding may require dental protection.
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Which symptoms may warrant assessment?
Pain with chewing, restricted opening, locking or a painful joint sound may justify assessment. Muscle fatigue or pain near the ear may also occur. Difficult activities and changes over time help clarify the situation.
A painless click is common and may need no treatment. Conversely, tooth pain, infection or another condition can be felt around the jaw. Assessment should therefore look beyond the TMD label.
Chapter sources [1]
What is bruxism?
Bruxism means clenching or grinding teeth while awake or asleep. Some people are unaware of it. Worn or sensitive teeth, tired muscles and pain may lead a dentist to investigate.
Bruxism and TMD can coexist, but are not identical. Not everyone who clenches needs the same care. Dental assessment helps distinguish protecting teeth from treating pain.
Chapter sources [2]
Why do these problems develop?
TMD often has several contributing factors or no clear single cause. Trauma, individual factors, sleep and daily stresses may contribute. Stress can encourage some clenching habits without explaining every person’s symptoms.
A poor bite has not been shown to explain TMD systematically. Associated neck or back pain does not prove that the jaw causes every symptom either. Be cautious about promises to correct everything by changing tooth position.
How is assessment carried out?
A dentist or doctor examines the teeth, mouth and jaw and asks about symptoms. Opening, movement, muscles and joint noises may be assessed. Further investigations depend on the clinical question rather than being automatic.
Mention locking, injuries, medicines and sleep problems. Ear-area pain or dizziness may have another origin and need a different opinion. Their presence does not confirm TMD.
Chapter sources [1]
When is prompt care needed?
Tooth pain with swelling or fever needs urgent dental advice. Difficulty breathing or swallowing, or major mouth swelling, needs immediate help: call 112. Significant new locking or a jaw injury also needs prompt assessment.
A new headache with chewing pain and visual changes can indicate another urgent medical problem. Jaw pain with chest pressure, breathlessness or faintness also needs urgent help. Do not treat these combinations as ordinary muscle tension.
Which simple adjustments may help?
During a painful period, temporarily choosing easier-to-chew food and reducing chewing gum or wide opening may reduce demands. This does not mean maintaining a severely restricted diet or immobilising the jaw indefinitely.
If you clench while awake, discreet reminders may help you relax the habit. Avoid repeatedly checking your maximum opening. Discuss progression, particularly if eating becomes difficult or you lose weight.
What can physiotherapy contribute?
Appropriate care may address jaw movement and function and associated muscle difficulties. It should fit within dental or medical assessment. Exercises depend on the type of problem and your response.
Do not attempt to put a locked jaw back into place using online manoeuvres. Increasing pain or new locking requires reassessment. Check with the practice whether your needs match the available expertise.
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Splints and more complex treatment
A splint may be suggested to protect teeth affected by bruxism. That does not mean it cures every TMD pain. The dentist should explain its purpose, follow-up and what to do if it becomes painful.
Irreversible changes to teeth or the bite, and surgery, need particular justification. Evidence differs between treatments. Ask about conservative alternatives, expected benefits and risks before deciding.
In everyday life
Choosing care with clear goals
Assess
Pain, locking, tooth condition and daily impact.
Start simply
Conservative measures and suitable exercises when indicated.
Review
Check the effect before considering more complex options.
How can recovery be monitored?
Many problems improve, but some persist or recur. There is no single timeline. Follow meaningful changes: eating, speaking and yawning more comfortably, with fewer limitations.
If symptoms do not improve, revisit assessment rather than adding random exercises. Several professionals may be needed. Understanding the problem supports decisions without promising the same outcome for everyone.
Chapter sources [1]
Your questions
Should I worry about a clicking jaw?
A painless click without restricted movement is common and does not automatically require treatment. Seek advice if it becomes painful, locks or follows an injury.
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Is bruxism the same as TMD?
No. Bruxism describes clenching or grinding activity; TMD covers joint and muscle disorders. They may occur together or separately.
Will a splint fix every pain?
No. It may protect teeth, but pain relief is not guaranteed. A dentist should define its purpose and monitor it.
Can general neck exercises treat my jaw?
They are not a specific jaw programme. Pain or restriction in the jaw needs advice appropriate to its assessment.
Chapter sources [1]
Sources and references
- [1] NIDCR / NIH — Temporomandibular disorders
- [2] NIDCR / NIH — Bruxism
- [3] NICE CG150 — Headaches in over 12s: recommendations
- [4] NHS · Dental abscess
- [5] NHS — Tension headaches
- [6] NHS · Heart attack
- [7] CGDIS Luxembourg · 112
- [8] NHS · Stroke symptoms
- [9] NICE NG127 · Dizziness and vertigo in adults
Text updated on
Medical review: awaiting Hasib Selimovic.