An anxiety attack feels like a sudden wave of intense fear crashing through your body, even when there’s no obvious danger. Your heart pounds, your chest tightens, your hands shake, and you may feel certain something terrible is about to happen. Most episodes peak within 10 minutes and fade within 20 to 30 minutes, but those minutes can feel endless. The experience is so physical that many people end up in the emergency room convinced they’re having a heart attack.
Physical Symptoms During an Episode
The physical side of an anxiety attack is what catches most people off guard. Your body launches its fight-or-flight response as though you’re in real danger: the threat-detection center of your brain sends a distress signal to the hypothalamus, which floods your system with adrenaline. Your heart rate spikes, your breathing gets shallow and fast, and blood redirects to your major muscles. All of this happens in seconds, before your conscious mind has any say in the matter.
That cascade produces a recognizable set of sensations. Racing or pounding heartbeat is the most common, often accompanied by tightness or pressure in the chest. You may feel short of breath or like you’re choking, even though your airway is completely clear. Trembling, sweating, nausea, dizziness, and tingling in your hands or face round out the picture. Some people get chills; others feel a sudden flush of heat. These symptoms can show up in any combination, and different episodes may feel different even for the same person.
If your brain continues to read the situation as threatening, a second hormonal system kicks in. The adrenal glands release cortisol, which keeps your body revved up and on high alert. This is why some people experience rolling waves of symptoms over several hours rather than a single spike and drop.
What Happens in Your Mind
The psychological experience can be just as overwhelming as the physical one. A hallmark feeling is a sense of impending doom, a deep, gut-level conviction that you are dying, losing your mind, or about to lose control. This isn’t vague worry. It feels like absolute certainty, which is part of what makes it so terrifying.
Two other common mental symptoms are depersonalization and derealization. Depersonalization is the sensation of being detached from yourself, as if you’re watching your own body from the outside. Derealization is the feeling that the world around you isn’t real, like everything has become slightly dreamlike or two-dimensional. Both pass as the episode fades, but in the moment they can be deeply disorienting.
Racing thoughts are typical too. Your mind may loop through worst-case scenarios or fixate on the physical symptoms themselves, creating a feedback cycle: you notice your heart racing, which scares you, which makes your heart race faster. This “fear of fear” is one of the engines that keeps an episode going.
How It Differs From a Heart Attack
Because chest pain, shortness of breath, and a racing heart overlap with cardiac symptoms, it’s worth knowing the differences. An anxiety attack starts suddenly and peaks within minutes. Heart attack symptoms tend to build gradually and get worse over time. Anxiety-related chest pain usually fades within 20 to 30 minutes, while cardiac chest pain persists and doesn’t improve on its own.
Heart attacks are also more likely to cause pain that radiates into your arm, jaw, back, or stomach. If your symptoms ease when you sit down, slow your breathing, and use calming techniques, that points more toward anxiety. If chest pain persists or worsens after several minutes despite those efforts, seek emergency care.
“Anxiety Attack” vs. Panic Attack
“Anxiety attack” isn’t a formal clinical term, but most people use it to describe what clinicians call a panic attack. The diagnostic criteria require at least 4 out of 13 recognized symptoms, including palpitations, sweating, trembling, shortness of breath, chest pain, nausea, dizziness, chills or heat, tingling, derealization, depersonalization, fear of losing control, and fear of death. Episodes that involve fewer than four symptoms are sometimes called limited symptom attacks; these tend to be briefer, lasting as little as one to five minutes, but can still feel intense.
One important distinction clinicians make is between “expected” and “unexpected” attacks. An expected attack has a clear trigger, like being in a crowded room if crowds are a known source of anxiety. An unexpected attack comes out of nowhere, sometimes waking people from sleep. Unexpected, recurring attacks that lead to persistent worry about having another one are the defining feature of panic disorder.
The “Panic Hangover” Afterward
What surprises many people is how they feel after the episode ends. The acute symptoms may pass in half an hour, but the aftermath can linger for hours or even into the next day. This is sometimes called a panic hangover, and it happens because your body just burned through a massive surge of stress hormones. Recovery takes time.
Common aftereffects include profound tiredness, muscle aches (especially in the neck and shoulders), brain fog, and difficulty concentrating. You might feel physically heavy or “weighted down,” irritable, sensitive to noise and light, or unmotivated and wanting to withdraw. Some people have trouble sleeping that night. None of this means something is wrong with you. It’s your nervous system recalibrating after a false alarm.
What to Do During an Episode
The most effective in-the-moment strategy is to slow your breathing. Fast, shallow breathing during an attack lowers carbon dioxide levels in your blood, which actually intensifies dizziness, tingling, and the feeling of unreality. Take slow, deep breaths: inhale through your nose for a count of four, hold briefly, and exhale through your mouth for a count of four or longer. Lengthening the exhale activates the branch of your nervous system responsible for calming you down.
Grounding techniques can also interrupt the spiral. The 5-4-3-2-1 method works by pulling your attention out of your racing thoughts and anchoring it in your immediate surroundings:
- 5: Name five things you can see around you.
- 4: Touch four things near you (a table, the fabric of your clothing, the floor under your feet).
- 3: Identify three things you can hear.
- 2: Notice two things you can smell.
- 1: Pay attention to one thing you can taste.
This works because it forces your brain to process sensory details, which competes with the fear signals keeping the attack alive. It won’t make symptoms vanish instantly, but it can shorten the episode and reduce the intensity. Sitting or lying down, placing your feet flat on the ground, and reminding yourself that the feeling will pass are all small actions that help your body shift out of high alert.