Uncontrolled laughing or crying can be more than just a surprising emotional reaction, it may signal a neurological condition called pseudobulbar affect (PBA). PBA causes sudden, involuntary emotional ...

The symptoms: The woman visited a clinic because she had long experienced bursts of uncontrollable laughter, which doctors described as "mirthless" in a report of her case. According to the patient, ...

A woman had experienced sudden bursts of uncontrolled laughter her whole life. A brain scan revealed why. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...