The most common cause of trismus is due to infection in muscle:: (A) Masseter, (B) Medial pterygoid, (C) Temporalis, (D) All of the above
Answer is B. The most common cause of trismus is due to infection adjacent to muscles of jaw closure i.e., masseter, medial pterygoid, temporalis mostly due to involvement of pericoronal, submasseteric, and pterygo mandibular spaces.