How can bruxism cause headaches? Bruxism causes morning, tension, and migraine headaches via jaw muscle fatigue and trigeminal sensitization. Learn the types, triggers, and relief options.
Written by Ann C. McCulloch, MBA | Medically Reviewed by Bradley Allen Eli, DMD, MS
Jaw rest for TMJ pain means minimizing unnecessary jaw movement and muscle tension to interrupt the cycle of clenching, fatigue, and pain that drives temporomandibular joint (TMJ) disorders. It centers on three measures: maintaining a relaxed jaw resting posture, wearing an anterior bite splint to block clenching, and eating a soft, low-effort diet. Together, these strategies reduce muscle overuse and give strained jaw tissue room to heal.
Most chronic TMJ disorders start with acute jaw pain. If that pain persists untreated, neurons in the central nervous system become hyperexcitable, leading to “central sensitization,” where normal sensations register in the brain as painful. This causes jaw muscles to tense and fatigue, generating even more pain. This vicious cycle is the hallmark of chronic TMJ disorders, and it’s closely tied to the stress and muscle tension patterns discussed in our TMJ and stress guide. A 2024 study published in the Journal of Oral & Facial Pain and Headache found that central sensitization and somatic symptom burden are common among TMD patients and closely tied to muscle pain intensity, which is why doctors now prioritize treating acute jaw pain early to prevent central sensitization and chronic pain. A foundational part of that early treatment is adequate jaw rest.
Proper jaw posture is one of the key techniques you can use to rest your jaw. The “resting mouth position” involves your tongue, lips, and jaw:
One quick note about the “N” position of the tongue: actively placing the tongue in this position can be a powerful technique to reduce jaw muscle tension and clenching. If you’re having jaw pain, try pressing your tongue against the roof of your mouth in the “N” position. For more guided techniques, see how to relax a tense jaw.
Here are some other posture elements that are important for jaw rest:
TMJ mouth guards, sometimes called intraoral devices or splints, are powerful tools for jaw pain relief. “With active jaw pain, a guarding reflex occurs where the jaw muscles become tense and hyperactive. This muscle tension only makes the pain cycle worse. In this situation, intraoral splints are among the most powerful tools at our disposal to stop muscle tension and promote jaw rest”, explains Bradley Eli, DMD, MS, an orofacial pain specialist.
While there are many mouth guards out there, the best TMJ mouth guard for jaw rest is the anterior bite splint. Anterior bite splints (like the QuickSplint®) are custom fit to the anterior teeth, leaving the back teeth uncovered. By preventing the back teeth from contacting each other, the clenching reflex is relieved. This promotes rapid jaw muscle relaxation and jaw rest. A 2024 randomized controlled trial comparing occlusal splint therapy to muscle injections found that splint therapy meaningfully reduced jaw muscle pain and improved mouth opening within just one to three months.
The anterior bite splint is also “permissive” by design, meaning the upper and lower jaw are allowed to slide over each other smoothly so the joint “seats itself” in the most comfortable position. Anterior bite splints are sometimes called “anterior deprogrammers” because they allow jaw muscles that are “programmed” to be tense from the guarding reflex to relax or “deprogram.” This brings the entire TMJ complex back into balance.
The key to a TMJ diet is knowing what to eat and how to eat it. As you’d imagine, the best foods for jaw rest are soft foods. Here are some TMJ-friendly foods that are soft and delicious:
Equally important for jaw rest is avoiding certain food textures. This includes anything hard or chewy. It also means avoiding chewing gum, biting your fingernails, or chewing on pen caps or toothpicks.
Your eating technique is also part of an optimal TMJ diet. You want your food in small morsels, so you don’t have to stretch your jaw to eat it. Chew evenly, being vigilant to use both sides of your jaw. Finally, try to eat mindfully, which means eating slowly and with purpose, paying attention to the flavors and textures of each bite.
Treating acute jaw pain is critical to preventing the development of a chronic TMJ pain disorder. Jaw rest is an important part of any TMJ self-care program, but other measures can help you achieve jaw pain relief too. These include oral splint therapy, using hot and cold packs on the jaw, self-directed pain management techniques, and over-the-counter analgesics. If pain flares despite consistent self-care, it’s worth reviewing the signs of a TMJ flare-up so you know what’s normal and what needs more attention.
The Speed2Treat® Home Healing Kit was specifically developed to give you everything you need to achieve rapid jaw pain relief. This includes the QuickSplint®, an anterior bite splint that you can make at home and start using the same day as delivery. Start your journey toward effective TMJ self-care and jaw pain relief today!
Most people benefit from consistent jaw rest practices for at least two to four weeks during an active flare. Mild cases often improve within days, while more persistent muscle pain may take several weeks of combined rest, splint use, and dietary changes to settle.
The correct resting position keeps the lips together without strain, the tongue resting gently against the roof of the mouth, and the teeth slightly apart rather than touching or clenched.
Yes. Extended talking, singing, or other repetitive jaw movement can fatigue already-strained jaw muscles. Taking short breaks and avoiding wide jaw movements during a flare can help reduce this strain.
Yes. Chewing gum is one of the most common aggravators of TMJ pain because it requires sustained, repetitive muscle activity. Avoiding gum, along with other chewy or hard foods, is a simple way to support jaw rest.
An anterior bite splint can help by interrupting the clenching reflex, which allows the jaw muscles to relax rather than staying in a guarded, tense state. This is different from a standard full-coverage night guard, which mainly protects the teeth rather than relaxing the muscles.
Jaw rest is a foundational self-care measure, but it’s usually most effective when combined with other strategies like splint therapy, dietary changes, and addressing contributing factors such as stress. If pain persists despite consistent self-care, it’s worth discussing additional treatment options with a provider.
