Why Does My Jaw Muscle Sometimes Lock or Go out of Place When Yawning?

The experience of a jaw muscle suddenly locking or going out of place, particularly during yawning or wide mouth opening, can be both uncomfortable and confusing. This article aims to provide clarity and understanding about why this phenomenon occurs, focusing on the role of the anterior belly of the digastric muscle and suggesting ways to manage this issue.

Understanding the Anatomical Issue

The anterior belly of the digastric muscle is one of the relatively small muscles in the floor of the mouth, located in front of the hyoid bone. This muscle runs from the posterior surface of the mandible (lower jaw) to the hyoid bone, which is a key structure in the neck and throat. In times of stress or strain, this muscle can spasm, causing a locking sensation or movement out of place.

Similar situations can occur in other parts of the body where muscles can cramp or spasm, such as leg cramps. However, when this happens in the jaw, it can feel alarming and may evoke anxiety. The question often asked is, 'Is this serious?' Generally, no, it is not. But understanding the underlying cause can be reassuring.

The Cause of The Spasm

The anterior belly of the digastric muscle can spasm due to various factors, including stress, overuse, or abnormal jaw movements. Stress can be particularly triggering, as it can lead to muscle tension throughout the body, including the jaw. Overuse, such as prolonged talking, eating, or clenching the teeth, can also contribute to muscle spasms. Additionally, abnormal jaw movements, such as yawning widely or opening the jaw too quickly, can strain the jaw muscles.

It is important to recognize that while these spasms can be uncomfortable, they are often not a sign of a serious underlying condition. However, if these spasms occur frequently or if there is associated pain or difficulty in speaking or chewing, it is advisable to consult a healthcare professional.

Managing Jaw Muscle Spasms

Most muscle spasms in the jaw, especially those occurring during yawning or opening the mouth wide, will resolve on their own. However, there are steps you can take to manage them and reduce their frequency:

Relax: The first step is to relax. Tension often exacerbates spasms. Try to minimize stress and practice relaxation techniques, such as deep breathing or meditation.

Manual Release: Gently push your jaw back into place if it feels locked. Stand in front of a mirror and do this while looking at your mouth.

Warm Compress: Applying a warm compress to the jaw can help relax the muscles and alleviate spasms.

Stop Clenching: If you find yourself clenching your teeth, make a conscious effort to relax them. Practicing this can help prevent future spasms.

Regular Breaks: If your jaw is frequently strained, such as during prolonged talking or eating, take regular breaks to give your muscles a chance to relax.

Conclusion

In conclusion, the anterior belly of the digastric muscle can spasm, causing a sensation of the jaw locking or moving out of place. While this can be alarming, it is not necessarily a sign of a serious condition. Managing these spasms involves relaxation techniques, gentle manual release, the use of warm compresses, and being mindful of jaw clenching. If you experience frequent or severe spasms, consulting a healthcare professional may be beneficial to rule out any underlying issues.