Other Causes
- Acute osteomyelitis
- Ankylosis of the TMJ (fibrous or bony)
- Condylar fracture or other trauma.
- Gaucher disease which is caused by deficiency of the enzyme glucocerebrosidase.
- Giant cell arteritis
- Infection
- Local anesthesia (dental injections into the infratemporal fossa)
- Needle prick to the medial pterygoid muscle
- Oral submucous fibrosis.
- Radiation therapy to the head and neck.
- Tetanus
- Malignant hyperthermia
- Malaria severa
- Secondary to neuroleptic drug use
- Malignant otitis externa
- Mumps
- Peritonsillar abscess
- Retropharyngeal or parapharyngeal abscess
- Seizure
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