The most common reason for jaw pain is a TMJ disorder. Temporomandibular Joint Disorder (TMD) affects nearly 1 in 8 people and is most common in women. TMJ disorders happen as a result of problems with the temporomandibular joint. This joint works as a hinge that allows your jaw to move up and down and side to side. When it has an imbalance, damage, or misaligned, it can lead to serious jaw pain, face pain, neck pain, headaches, migraines, clogged ears, tinnitus, and other symptoms. The reason patients commonly experience jaw pain with TMJ is that the condition causes the muscles adjacent to the jaw to become strained and sore. These muscles run through your entire face, jaw, and even down your neck. As a result, you can experience not only jaw pain but pain in other areas of your body.