Risus Sardonicus Overview
Risus sardonicus is a type of facial muscle spasm where a person appears to be smiling or grinning. It is an uncommon symptom that may be caused by a few disorders: tetanus (“lockjaw”), tetany (hypocalcemia causing muscle spasms), Wilson’s disease, strychnine poisoning, and some other causes.
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- Tetanus: Tetanus is an infectious disease that is caught from exposure to infected soil, animal feces, or similar exposures. Tetanus is
... More on Tetanus »
- Tetany: Tetany is a disorder resulting from low blood calcium (hypocalcemia). Tetany’s low calcium causes various nerve sensations (tingling, burning
... More on Tetany »
- Wilson’s Disease: Wilson’s Disease is a rare genetic disease of the metabolism resulting in too much copper. It is an autosomal
... More on Wilson’s Disease »
- Malingering: Malingering is the medical name for a patient giving false information to a doctor for personal gain. The motive is
... More on Malingering »
- Lockjaw: Lockjaw, also called trismus, is the symptom of a tight jaw (“locked jaw”), making it difficult to open the mouth
... More on Lockjaw »
Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.