[yellowdoghunter]

LOL!

[Howlin]

Possible causes of symptom: Inappropriate Laughter: The following medical conditions are some of the possible causes of Laughter as a symptom. There are likely to be other possible causes, so ask your doctor about your symptoms.

• Normal happy personality - of course, laughter need not be inappropriate.
• Drug intoxication
• Substance abuse
• Tic disorders (type of Mental illness)
• Tourette syndrome - inappropriate outbursts
• Social anxiety - may be "nervous laughter"
• Dementia
• Angelman syndrome