Loss of Consciousness (Unconsciousness)

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When a person experiences a loss of consciousness, he or she is neither awake nor aware of the external environment. Loss of consciousness often is described as being "knocked out."

Attempts to arouse an unconscious person to an alert state may not be successful. The person may not respond at all or may respond with moans or nonpurposeful movements.

A loss of consciousness for longer than 60 seconds needs to be evaluated by a doctor.

Any loss of consciousness after a head injury, even if only for a short time, requires immediate evaluation by a doctor.




The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.