TMJ disorder is also known as TMJ dysfunction or simply TMD. It can refer to any number of problems that affect how the jaw joint and the surrounding tissues function. When something goes awry with this delicate system, it can result in symptoms that affect your ability to chew food, laugh, speak, yawn, and sneeze with ease.

TMD can be caused by a number of different factors, such as overuse of the jaw joint, chronic stress, a misaligned bite, and more.