Temporomandibular joint dysfunction, or TMJ, can result in headaches, clicking or popping noises during chewing, or pain when yawning. While many people deal with jaw pain or TMJ disorders, few of them probably realize how poor posture can contribute to the problem. Unfortunately, a sedentary lifestyle and a desk job can take their toll on someone’s skeleton, but there are things you can do to prevent TMJ issues from happening. Here’s how poor posture can cause jaw pain as well as what you can do to prevent it.