The most common sensations during a panic attack include a fear of death, shortness of breath, dizziness, chest tightness, heart palpitations, trembling, cold sweats, and sometimes a combination of these symptoms. These sensations can be exacerbated by the individual's surrounding environment.
Let's take the example of the subway, a place where many people experience panic attacks. The subway is typically hot and stuffy, causing a person to feel suffocated, breathe rapidly, and experience a faster heartbeat. The brain searches for a source of danger but cannot find one. The body interprets this state as anxiety, leading to a panic attack: blood vessels constrict, and the "fear hormone" adrenaline is released, which can be both a triggering factor and a consequence of the attack.