Pseudobulbar affect (PBA)

Pseudobulbar affect (say "soo-doh-BUL-ber AFF-ect") is a problem in the brain that causes you to cry or laugh for no reason. The sudden fits of tears or laughter may have nothing to do with what you're feeling. And you can't control them. This behavior can cause awkward social situations.

Normally, the "feel" and "express" parts of your brain work together. But with PBA, the expressive part of your brain can trigger behavior on its own. PBA can happen along with certain health problems that affect the brain, such as Parkinson's disease or damage from a stroke.

Living with PBA can be very stressful. Medicine can help improve PBA symptoms.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

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