When jaw muscles are irritated, jaw movement is disrupted causing discomfort including muscle tenderness and issues in opening your jaw. Teeth grinding due to psychological stress causes muscle pain and tightness around the jaw area. Excessive jaw clenching or forceful biting other causes may include stress, arthritis, bad posture, and gum chewing. might also strain TMJ and cause pain. It can also be caused by several things including injury to your teeth or jaw. If your jaw or teeth are misaligned or if you grind your teeth, you may also find yourself with TMJ. We strongly suggest not ignoring the symptoms and contact or visit our dentist in our dental clinic immediately. If left untreated, TMJ can result in arthritis of joints or might cause your jaw to lock.