Overwhelm describes a state where incoming demands exceed the nervous system’s current capacity. It happens when there is more sensory, cognitive, emotional, or social input than a person can process in the moment. When overwhelmed, people may struggle to think clearly, make decisions, communicate, or regulate emotions.

Overwhelm can show up as irritability, shutdown, anxiety, tearfulness, or a strong urge to withdraw. Overwhelm from overload is sometimes confused with anxiety, even though it’s often driven by too much input rather than fear, and tends to ease with less input, more support, and time to recover.