A therapy device is provided for trismus prevention and treatment, and includes a first arm hingedly connected to a second arm, and a spring device disposed therebetween to press the first and second arms apart. A pair of bite pads are provided at the ends of each of the first and second arms and are designed to be engaged by a users teeth or gums in order to bite down on the device to exercise the users jaw, and more specifically, the muscles of mastication.
