Does your jaw pop or click when you open and close it? Is it painful? Do you get frequent headaches?These are all symptoms of temporomandibular joint dysfunction (TMJD). According to the TMJ Association, Ltd, approximately 12% of the population in the United States suffers from TMJD. This disorder may "affect a persons ability to affect a person’s ability to speak, chew, swallow, make facial expressions, and even breathe." Chiropractors are trained to analyze the biomechanics