He caused the deaths of babies on whom he operated for the trismus nascentium condition. Temporary trismus occurs much more frequently than permanent trismus. Patients of Sims' fistula and trismus nascentium operations were not given available anesthetics. Trismus Pseudocamptodactyly syndrome is a rare genetic condition. There is usually an associated trismus, cervical lymphadenopathy, malaise and pyrexia. Submasseteric abscesses are rare and are associated with marked trismus. Symptoms include oedema in the area, trismus as well as otalgia. Another definition of trismus is simply a limitation of movement. It may invade pterygoid muscles and mandible, resulting in pain and trismus. Stridor, trismus, and cyanosis may also be seen when an impending airway crisis is nearing. Sims also thought trismus nascentium developed from skull bone movement during protracted births. Common signs and symptoms include pain, difficulty chewing, trismus, mouth-to-skin fistulas and non-healing ulcers. Chronic use of the drug might also cause trismus, the inability to open the jaw. Mandibular trismus is a rare finding but may be present with larger swellings. A defining feature is the inability to open the mouth completely (trismus).