A panic attack feels like a sudden, overwhelming wave of fear paired with intense physical symptoms that can make you believe something is seriously wrong with your body. Your heart may pound at 200 beats per minute or faster, your chest tightens, and you might genuinely think you’re dying. The whole experience typically peaks within 10 minutes and rarely lasts more than an hour, but while it’s happening, it can feel like the longest minutes of your life.
The Physical Sensations
The physical side of a panic attack is what catches most people off guard. It doesn’t feel like “just anxiety.” It feels like a medical emergency. The most commonly reported symptoms include a racing or pounding heartbeat, shortness of breath or a choking sensation, chest pain, dizziness, trembling, sweating, chills or hot flashes, nausea, and numbness or tingling in the hands and face.
These symptoms hit fast and hard. Your body’s alarm system floods you with stress hormones, which spike your heart rate, redirect blood flow to your muscles, and speed up your breathing. That rapid breathing (hyperventilation) is responsible for a surprising number of the sensations: the tingling in your fingers, the lightheadedness, the feeling that you can’t get enough air even though you’re actually breathing too much. Your chest may ache from the effort of breathing so hard and fast, and your stomach can cramp or churn with nausea.
Research from the Salk Institute has identified a specific brain circuit that drives these symptoms. A cluster of neurons in the brainstem, an area that directly controls breathing, heart rate, and body temperature, fires off alarm signals using a small protein messenger called PACAP. That signal reaches another brain region that produces both the behavioral fear response and the physical symptoms simultaneously. This is why the body sensations feel so real and so medical: they’re being generated by the same part of the brain that controls your vital functions.
What Goes Through Your Mind
The psychological experience is just as intense as the physical one, and often more distressing in hindsight. The most common thought during a panic attack is some version of “I’m dying” or “I’m having a heart attack.” Others report feeling certain they’re losing their mind, about to pass out, or completely losing control of their body. There’s often a crushing sense of impending doom, a conviction that something catastrophic is about to happen, even when you can’t identify what.
Some people experience derealization or depersonalization during a panic attack. Derealization makes your surroundings feel unreal, dreamlike, or distorted, as if you’re watching the world through a screen. Depersonalization is the feeling of being disconnected from your own body, like you’re observing yourself from outside. Both sensations are disorienting and can add another layer of fear on top of an already terrifying experience. The important thing to know is that these are neurological responses to extreme stress, not signs of psychosis. You remain aware that something feels “off,” which is what distinguishes this from a true break with reality.
After the first panic attack, many people develop intense worry about having another one. That anticipatory anxiety can become its own ongoing problem, leading people to avoid places, situations, or activities they associate with previous attacks.
How It Builds and How Long It Lasts
Panic attacks begin suddenly. Some are triggered by a specific stressor, but others seem to come out of nowhere, even during sleep. Symptoms escalate quickly and usually peak within 10 minutes of starting. Some attacks are brief, lasting only 1 to 5 minutes. Others stretch longer, and in some cases, multiple attacks of different intensities roll into each other over several hours, like waves, making it feel like one continuous episode.
Most individual attacks resolve within 20 to 30 minutes. After the peak passes, symptoms gradually wind down, though they rarely switch off cleanly. You may feel shaky, teary, or physically spent for a while afterward.
The Aftermath
What many people don’t expect is how rough the hours and days after a panic attack can feel. Sometimes called a “panic hangover,” this recovery period brings its own set of symptoms. Physically, you may feel exhausted, achy, and sore, especially in your chest and shoulders from hyperventilating and tensing your muscles. Headaches, lingering nausea, and residual trembling are common.
Cognitively, expect brain fog, difficulty concentrating, sluggishness, and irritability. Many people describe a background hum of dread that takes time to fade. You might feel detached, chilly, or emotionally flat. These aftereffects can last anywhere from a couple of hours to a full week, depending on the severity of the attack and whether it was your first or one of many.
Panic Attack vs. Heart Attack
Because chest pain and a racing heart are hallmarks of both panic attacks and heart attacks, it’s worth knowing how they differ. The chest pain during a panic attack is typically sharp or stabbing and stays localized in the chest. Heart attack pain feels more like pressure, squeezing, or a heavy ache, often described as an elephant sitting on your chest. Heart attack pain also tends to radiate to the arm, jaw, or neck, which panic attack pain generally does not.
The triggers are different too. Heart attacks tend to follow physical exertion, like shoveling snow or climbing stairs. Panic attacks are tied to emotional stress or arise without any obvious trigger. The timeline is also telling: panic attack symptoms peak and then fade within minutes to an hour. Heart attack symptoms persist or come in waves, getting better and worse but never fully letting up.
None of this means you should try to diagnose yourself in the moment. If you’re experiencing severe chest pain for the first time and you don’t know what’s happening, treat it as a potential cardiac event. But if you’ve had panic attacks before and recognize the pattern, knowing these differences can help you avoid a spiral of additional fear that makes the attack worse.
Why It Feels So Real
One of the most frustrating things about panic attacks is hearing “it’s just anxiety” when your body is producing symptoms that feel identical to a life-threatening emergency. The reason it feels so real is that the physical symptoms are real. Your heart genuinely is pounding at an abnormal rate. You genuinely are hyperventilating. Your blood pressure, temperature, and muscle tension genuinely change. The brain circuitry that produces panic symptoms overlaps with the circuitry that manages your heart rate and breathing, so the alarm signal doesn’t just make you feel afraid. It physically alters how your body is functioning in that moment.
Understanding this can be surprisingly useful. Knowing that the tingling in your hands comes from breathing too fast (and will stop when your breathing slows), or that the chest soreness is muscular rather than cardiac, doesn’t make a panic attack pleasant. But it removes the layer of catastrophic interpretation that often makes the experience spiral from bad to unbearable.