Jaw pain, also known as Temporalmandibular Joint Disorder (TMD), is experienced by many people in some form or another. Symptoms can include minor to severe pain in the temporalmandibular joint (TMJ) itself, jaw popping, headaches, aching in the facial muscles, grinding teeth, difficulty chewing, tightness in the jaw and can be responsible for neck pain, shoulder pain, and even tinnitus (or ringing in the ears).