The temporomandibular joint (TMJ) acts like a sliding hinge, connecting your jawbone to your skull. TMJ disorders can cause pain in your jaw joint and in the muscles that control jaw movement.
The exact cause of a person’s TMJ disorder is often difficult to determine. Your pain may be due to a combination of problems, such as arthritis or jaw injury. Some people who have jaw pain also tend to clench or grind their teeth, but many people habitually clench their teeth and never develop TMJ disorders.
In most cases, the pain and discomfort associated with TMJ disorders can be alleviated with self-managed care or nonsurgical treatments. Severe TMJ disorders may require surgical repair.
Symptoms of TMJ
- Pain or tenderness of your jaw
- Aching pain in and around your ear
- Difficulty chewing or discomfort while chewing
- Aching facial pain
- Locking of the joint, making it difficult to open or close your mouth
TMJ disorders can also cause a clicking sound or grating sensation when you open your mouth or chew. But if there’s no pain or limitation of movement associated with your jaw clicking, you probably don’t need treatment for a TMJ disorder.
Causes of TMJ
The temporomandibular joint (TMJ) combines a hinge action with sliding motions. The parts of the bones that interact in the joint are covered with cartilage and are separated by a small shock-absorbing disk, which normally keeps the movement smooth.
Painful TMJ disorders can occur if:
- The disk erodes or moves out of its proper alignment
- The joint’s cartilage is damaged by arthritis
- The joint is damaged by a blow or other impact
In many cases, however, the cause of TMJ disorders isn’t clear. TMJ disorders most commonly occur in women between the ages of 20 and 40, but may occur at any age.