Dental surgery:
Oral surgery, including wisdom tooth extraction, may cause inflammation in the mouth, which can lead to trismus. Hyperextension, which is having to open the mouth wider than its usual range of motion, during surgery may also lead to lockjaw.
Infection:
Infections can contribute to trismus in some cases.
Types of infections that may do this include:
• mumps
• tetanus
• tonsillitis
• peritonsillar abscess
• other types of abscess
Cancer or cancer treatment:
Cancerous tumors in the head or throat can affect the function of the jaw. Radiation treatment for these tumors can also cause trismus. According to a small 2016 studyTrusted Source consisting of 30 participants with oral cancer, trismus affected 53.3% of them at the time of diagnosis. This number increased to 86.7% after surgery and 85.7% after radiotherapy.
Courtesy: Mayo Clinic
