CMD: When the Jaw Takes Over Your Daily Life

Ms. M. walked into the office with a statement I’ve heard many times before: “I thought I had dental problems.” The dentist hadn’t found anything. No cavity, no infection, no explainable cause. Nevertheless: pain when chewing, a clicking sound when opening her mouth, and a stiff jaw in the morning, as if she’d been clenching her teeth all night. What she didn’t know at the time: that’s exactly what she’d been doing.

CMD—craniomandibular dysfunction—is one of the most underestimated conditions I see in my practice. The term sounds technical, but it describes something very common: the interaction between the temporomandibular joint, the masticatory muscles, and bite function becomes unbalanced. The consequences range from jaw pain to headaches to neck pain, which at first glance seem to have nothing to do with the mouth.

Why does CMD develop in the first place? There is rarely a single cause. More often, it’s a combination of factors: nighttime teeth grinding, high levels of mental stress, a forward-tilted head posture in daily life, lack of exercise, and perhaps a muscular imbalance that has built up over the years. The body compensates for a long time—until eventually it can no longer do so.

That’s why, during the evaluation, we never look at just the jaw on its own. We assess the mobility of the cervical spine, the tension in the neck muscles, and the movement pattern when opening the mouth, and we ask about sleep, stress, and habits. Only this overall picture reveals where the actual strain lies.

The good news: In most cases, CMD responds well to treatment. This includes manual therapy to relax the masticatory muscles, targeted exercises to improve jaw function, postural work for the cervical spine, and, where necessary, collaboration with dental professionals—for example, when considering a splint.

After a few weeks, Ms. M. was amazed at how much her neck tension had improved, even though we had never specifically treated “just” her neck. If you understand the jaw, you often understand the neck as well. And vice versa.

If you wake up in the morning with a tense jaw or find chewing increasingly difficult, it’s worth taking a closer look. Not all jaw pain originates in the teeth.