Presentation: Patient is observed to continue laughing with no significant stimuli. Patient may appear to be hyperactive and may complain of stomach cramps. Range of laughing involves pro-traction, traction, abduction and adduction. In more severe condition, patient may laugh in all forms of motion and tears may swell up in the eyes. Some patients are noted to have pinkish red skin at the facial region.
Causes: Exact cause is unknown. However, research has shown that patients are more inclinded to laugh when watching a movie such as White Chicks in the cinema or playing intra-faculty table tennis games with each ball missed or hit.
Age/Gender/Race: ULS is equally dominant in all ages/gender or race. However it is an extremely rare autonomic syndrome.
Caution: Do not force patient to keep still as this may generate a even more violent reaction. In most circumstances, it is believed that ULS works with a positive feedback mechanism where patient tend to laugh even more and loudly when being forced to stop.
Possible Treatment: Remove patient from his cinema seat or from the table tennis courts or any possible laugh inducing elements. Do note that this is a rare occurence and handling of patients must be extremely careful as any mismanagement may result to a even more severe diesase known as CBS a.k.a Charging Bull Syndrome.
