A jaw stretching device including a base arm, a lever arm, and a piston arm. A piston channel is formed through the base arm between a connection end and a mouthpiece end. A first mouthpiece is attached to the base arm and a second mouthpiece is attached to the piston arm. The lever arm is connected to the base arm and is capable of rotating relative to the base arm about the connection end. The piston arm includes a length positioned between a pivot end and an attachment end. The length has a curved pattern. The piston arm is positioned in the piston channel and the curved pattern of the length is configured to slide through the piston channel. The lever arm is attached to the piston arm. The piston arm is capable of rotating relative to the lever arm about a pivot end.
