TMD stands for temporomandibular disorder. This disorder stems from problems with the temporomandibular joint. This joint connects the lower jaw to the skull. It controls movements needed for eating, speaking, singing, laughing, etc. People with TMD often experience pain in the jaw and surrounding areas. There is not always a clear cause for the disorder but it can be attributed to actions such as teeth grinding, clenching or dislocation of the jaw.

In LeAnn Rimes’ case, a dislocated jaw was the source of her misery and the reason for the interrupted concert. However, the majority of patients suffering from TMJ can attribute their pain to teeth grinding.