A bruxism sensor includes a diaphragm switch which provides an electrical output including a diaphragm separating a pressure side having a pressure side inlet and a suction side having a suction side inlet. An audible alarm having an electrical input is coupled to the electrical output. A first hose has one end is fluidically coupled to the pressure side inlet and a biting configured opposite end (biting end) for positioning between teeth of a user. Wherein upon a contraction of a mandible of the user, the biting end is squeezed which generates air pressure that is applied to the pressure side to generate a pressure level sufficient for activating the diaphragm switch, and while the diaphragm switch is activated, the audible alarm automatically sounds an alarm for alerting the user of contraction of their mandible.
