What is a Panic Attack and When Is It Panic Disorder? A panic attack is a sudden surge of intense fear or discomfort that peaks within minutes, often occurring "out of the blue" but sometimes in response to a trigger. It's the body's fight-flight-freeze response — its internal "alarm system" — firing at full intensity even when there's no real danger. The experience is deeply uncomfortable, but it isn't actually dangerous: the body is doing exactly what it's designed to do wh