An anxiety attack feels like your body has sounded a full emergency alarm when there’s no actual emergency. Your heart pounds, your chest tightens, you can’t catch your breath, and an overwhelming wave of fear crashes over you, often peaking within about 10 minutes. The experience is so physically intense that many people having one for the first time believe they’re having a heart attack.
The Physical Sensations
The most striking thing about an anxiety attack is how physical it is. This isn’t “feeling worried.” It’s a full-body event. Your heart races or pounds so hard you can feel it in your chest, neck, or throat. Your hands may tremble or go numb and tingly. You might break into a sweat, get hit with chills, or feel both at the same time.
Chest pain or tightness is one of the most alarming symptoms, and it’s the main reason people end up in emergency rooms during an attack. Difficulty breathing, or the sensation that you can’t get enough air, often accompanies it. Some people feel dizzy or lightheaded, while others experience stomach pain, nausea, or a sudden wave of weakness that makes their legs feel unreliable. Your muscles tense up across your body, particularly in your shoulders, jaw, and neck.
The Emotional and Mental Experience
Alongside the physical symptoms, anxiety attacks bring intense psychological distress. The hallmark feeling is fear, but it’s not the kind you can reason with. Many people describe a sense of impending doom, a conviction that something terrible is about to happen even when they can’t name what it is. Others feel a sudden, gripping fear of dying or a fear of losing control, as though they might pass out, scream, or “go crazy.”
Some people also experience strange sensory distortions during an attack. Depersonalization makes you feel detached from your own body, as if you’re watching yourself from the outside or playing a character in a movie. Derealization makes your surroundings feel unreal, like you’re looking through a clouded window or living inside a dream. Objects might look oddly sized or distorted. These sensations are temporary but deeply unsettling, especially if you’ve never experienced them before.
Why Your Body Reacts This Way
Every symptom of an anxiety attack traces back to your body’s built-in threat response. When your brain’s alarm center detects danger (real or perceived), it triggers the sympathetic nervous system, which signals your adrenal glands to flood your bloodstream with adrenaline. That single hormone is responsible for most of what you feel.
Adrenaline makes your heart beat faster to push blood toward your muscles. Your blood pressure rises. Your breathing rate increases so your lungs can pull in more oxygen, which gets routed to your brain, sharpening your senses and alertness. Your body releases stored blood sugar and fats for quick energy. Your muscles tense, preparing you to fight or run. Sweat appears to cool your body in anticipation of physical exertion.
The problem is that during an anxiety attack, there’s nothing to fight and nowhere to run. All that energy and physical preparation has no outlet, so you’re left standing in a grocery store or lying in bed with a body that feels like it’s in mortal danger. If the brain keeps perceiving a threat, a second hormonal system kicks in to keep the stress response going, which is why some attacks feel like they stretch on and on.
How Long an Attack Lasts
Most anxiety attacks build rapidly, reaching their worst point within a few minutes. The intense peak rarely lasts more than 10 to 20 minutes, though it can feel much longer when you’re in the middle of one. Some people experience waves where symptoms seem to ease and then surge again, extending the overall episode. The attack typically subsides on its own or when the perceived threat disappears.
This is different from general anxiety, which builds more slowly and can linger for hours, days, or even months as a lower-grade but persistent unease. An anxiety attack, by contrast, is sudden and acute.
The Aftermath
What many people don’t expect is how terrible they feel after the attack ends. The intense stress response leaves your body depleted, and the recovery period has earned the informal name “panic hangover.” You may feel profoundly tired, physically heavy, or weighed down. Muscle soreness is common, especially in your neck, shoulders, and jaw, because you were tensing them throughout the episode without realizing it.
Brain fog and difficulty concentrating are typical in the hours that follow. You might feel irritable, emotionally flat, or suddenly sensitive to noise and light. Some people get headaches or have trouble sleeping that night. Low motivation and a desire to isolate are also common. This recovery phase can last several hours or, for some people, most of the following day. It doesn’t mean something is wrong. Your body genuinely needs time to reset after that level of physiological stress.
How It Differs From a Heart Attack
Because chest pain, shortness of breath, and a racing heart overlap with cardiac symptoms, the two can be genuinely hard to tell apart in the moment. There are a few patterns that differ. Heart attacks most often start slowly, with mild discomfort that gradually worsens over several minutes, and episodes may come and go before the actual event. Anxiety attacks come on quickly and hit peak intensity within about 10 minutes.
The hallmark symptom that points toward an anxiety attack rather than a cardiac event is intense fear accompanying the physical symptoms. Women experiencing a heart attack are also somewhat more likely to have back pain, jaw pain, and nausea rather than classic chest pressure. That said, if you’re experiencing chest pain and aren’t sure what’s happening, treating it as a potential cardiac event and getting evaluated is the safer call. Many people discover their heart is healthy and learn they experienced a panic attack only after a medical workup rules out cardiac causes.
A Note on Terminology
“Anxiety attack” is not a formal clinical diagnosis. The term that appears in diagnostic manuals is “panic attack,” which is defined as an abrupt surge of intense fear or discomfort that peaks within minutes and involves at least four specific symptoms, from heart palpitations and sweating to derealization and fear of dying. In clinical screening tools, though, doctors do ask patients whether they’ve had “an anxiety attack” because it’s the language most people naturally use. For practical purposes, when someone describes an anxiety attack, they’re almost always describing what clinicians would call a panic attack. The experience is the same regardless of the label.