When Your Jaw Hurts or Clicks

Jaw symptoms show up as a mix of joint problems, muscle problems, and chewing habits or bite (occlusion) issues. The approach differs — from cases where there's only a sound and no pain, to a jaw that feels stiff every morning, to one that won't open properly. Boston Miso Dental Clinic in Uijeongbu identifies the cause first before deciding on treatment — a sound alone doesn't mean we recommend an appliance right away.

When the jaw hurts or clicks, what are the common causes?

• Disc displacement — a "click" when opening or closing the mouth. If there's no pain, we may simply monitor it.
• Masticatory muscle fatigue and tension — bruxism or clenching causes a stiff jaw and sore temples in the morning. This is the most common cause.
• Bite problems — a crown that sits too high, or a habit of chewing on one side after leaving a missing tooth unreplaced for a long time, puts strain on the jaw.
• Arthritis or trauma — inflammation of the joint itself. Pain in front of the ear when chewing, and difficulty opening the mouth.
• Referred pain from a wisdom tooth or tooth inflammation — sometimes what feels like a jaw problem is actually caused by a tooth.

What should I check at home first?

1. Sound vs. pain — whether it's only a sound, whether it hurts, or whether opening is difficult.
2. Time of day — worse in the morning points to bruxism or clenching; worse in the evening points to daytime habits (resting the chin on a hand, chewing on one side).
3. Mouth opening — whether three fingers fit in vertically. If they don't, opening is limited.
4. Chewing side — if you're chewing on only one side, why (a painful tooth, a missing tooth).

Until it's checked, avoid hard or chewy food, gum, wide yawning, and resting your chin on your hand. Warm compresses help with stiffness, and cold compresses help with acute pain.

What does the dentist check?

We check how far and along what path your mouth opens, joint sounds, and where it hurts when the muscles are pressed, and look at the shape of the joint and the condition of the teeth and wisdom teeth with a panoramic X-ray and 3D CT (CBCT). Articulating paper shows which tooth touches first, and wear patterns show whether there's bruxism. A key step here is ruling out a tooth problem that only feels like a TMJ (temporomandibular joint) issue.

How does the treatment approach differ by cause?

• Muscle tension or bruxism → Correcting daily habits, warm compresses, and a night guard (splint) if needed to spread out the load. More detail is on the TMJ Treatment page.
• Disc problems → Monitor if there's no pain; use an appliance and physical therapy if there is.
• Bite-related causes → Adjusting a crown that sits too high, or replacing a missing tooth. Restoring chewing balance can sometimes ease jaw symptoms too, as in this case of balancing the bite with an upper denture and lower implants.
• Tooth or wisdom tooth causes → Treat the tooth involved.

Don't put it off in these cases

• The mouth suddenly won't open or close.
• Pain in front of the ear when chewing lasts more than two weeks.
• The teeth or gums hurt along with the jaw — this could mean tooth inflammation.

Related Treatments & Cases

• TMJ Treatment
• When a Wisdom Tooth Swells and Hurts
• When a tooth hurts
• Symptom Checker

FAQ

Does it need treatment if my jaw only makes a noise?

If there's no pain or trouble opening, we often just monitor it. But if pain or a catching sensation starts along with the noise, it needs to be checked.

Do I have to wear an appliance?

It's used to spread out the load when the cause is muscle tension or bruxism. If the cause is the bite or a tooth, that's addressed first. We only recommend it when the exam shows it's needed.

Who treats TMJ problems?

It's diagnosed and treated at a dental clinic. If needed — for example, with significant joint deformity — we'll refer you to another specialist.

References

The order of evaluation and treatment approach described here are Boston Miso Dental Clinic's own standard; the causes, mechanisms and treatment effects are based on the references below.

※ This guide is general information. Even with the same symptom, the cause and the right treatment vary with your oral health. Dr. Lee, the Clinic Director, explains your diagnosis in person after an exam. Any dental treatment can cause side effects such as pain, bleeding, or infection, which vary from person to person.

The clinician responsible for treatment guidance at Boston Miso Dental Clinic is Dr. Jongbum Lee, Clinic Director, a board-certified specialist in Advanced General Dentistry (Korea).