Trismus

Lock Jaw; Masseter Spasm; Masseter Muscle Spasms; Masseter Spasms; Muscle Spasm, Masseter; Muscle Spasms, Masseter; Spasm, Masseter; Spasm, Masseter Muscle; Spasms, Masseter; Spasms, Masseter Muscle
Spasmodic contraction of the masseter muscle resulting in forceful jaw closure. This may be seen with a variety of diseases, including TETANUS, as a complication of radiation therapy, trauma, or in association with neoplastic conditions.