Freezing-up or being unable to move or respond physically during a traumatic event is an example of the "freeze response" or "trauma-induced paralysis." This is a natural, automatic defense mechanism that occurs when neither fighting nor fleeing feels possible. The body goes into a state of immobility as a survival strategy, often described as the body "playing dead" to avoid further harm. During this freeze response, a person may feel physically stuck, dissociated, or numb, unable to react even if they want to. It is not a choice or weakness but a way the body tries to protect itself in overwhelming situations.
The freeze response may be accompanied by a slowed heart rate, diminished breathing, and a sense of disconnection from the environment or oneself. In extreme cases, the body may go limp or shut down completely, which can help reduce pain or avoid attracting further harm. This intense freeze state is sometimes called "fright, flop, or collapse".
Therefore, freezing-up during trauma is a recognized trauma response called trauma-induced paralysis or the freeze response.
