A panic attack produces a sudden, intense wave of physical symptoms that typically peaks within 10 minutes and fades within 20 to 30 minutes. If someone near you appears to be in acute distress with no obvious cause, knowing what to look for can help you respond calmly and offer real support.
Physical Signs You Can See
Some panic attack symptoms are internal, but several are visible to anyone nearby. The most common signs you’ll notice include trembling or shaking, visible sweating, rapid or labored breathing, and the person clutching their chest. They may look pale or flushed, and their hands might shake noticeably. Some people pace or fidget; others freeze in place, gripping a table or wall for stability.
Hyperventilation is one of the most recognizable signs. The person may take fast, shallow breaths or gasp for air, sometimes saying they feel like they’re choking or suffocating. This rapid breathing can cause tingling or numbness in the hands and fingers, dizziness, and lightheadedness, all of which can make the person look unsteady on their feet.
What the Person Is Feeling Inside
Much of what makes a panic attack so terrifying happens where you can’t see it. Clinically, a panic attack involves four or more symptoms from a list of 13, and many of them are subjective experiences the person may or may not be able to describe in the moment.
A pounding or racing heart is nearly universal. Many people feel crushing chest pain or tightness, nausea, and a sensation of heat or chills sweeping through their body. Beyond the physical, there are psychological symptoms that intensify the fear: a conviction that they’re dying, a feeling of losing control or “going crazy,” and sometimes derealization, where the world suddenly feels unreal or dreamlike, as though they’re watching themselves from outside their own body.
These internal experiences explain why someone mid-attack often looks genuinely terrified rather than simply uncomfortable. They aren’t exaggerating. Their nervous system has triggered a full fight-or-flight response, flooding the body with adrenaline as though a real physical threat is present. The body reacts to this chemical surge with the same intensity it would use to escape danger.
How It Differs From a Heart Attack
Panic attacks are frequently mistaken for heart attacks because the symptoms overlap significantly: chest pain, shortness of breath, sweating, dizziness, and nausea all appear in both. Two key differences can help you tell them apart, though neither replaces medical evaluation if you’re uncertain.
First, location and spread of pain. During a panic attack, chest discomfort tends to stay localized in the chest. A heart attack more commonly produces pain that radiates into the jaw, arm, back, or neck. Second, timing matters. Panic attack symptoms typically fade within 20 to 30 minutes without treatment. Heart attack symptoms persist and don’t resolve on their own. If the person has risk factors for heart disease, if the pain spreads beyond the chest, or if symptoms last well beyond 30 minutes, treat it as a potential cardiac event.
Panic Attacks vs. Anxiety Buildup
“Anxiety attack” isn’t a formal clinical term, but people use it to describe intense episodes of anxiety. The key difference is onset. Anxiety tends to build gradually in response to a specific stressor: a looming deadline, a difficult conversation, financial pressure. You can often trace it to a trigger, and it escalates over minutes or hours.
Panic attacks, by contrast, strike suddenly and often without any obvious trigger. A person can be sitting calmly, watching television, or even sleeping when an attack begins. The intensity is also different. Panic attacks hit peak severity within about 10 minutes and involve a level of physical distress that feels life-threatening, even when it isn’t. If the onset was abrupt and the person seems blindsided by what’s happening, that points toward a panic attack rather than escalating anxiety.
What the Timeline Looks Like
A typical panic attack follows a predictable arc. It begins abruptly, climbs to peak intensity within 10 minutes or less, then gradually subsides over the next 10 to 20 minutes. The entire episode usually resolves within half an hour, though some people experience rolling waves of attacks at varying intensity over several hours, which can feel like one continuous episode.
Some episodes are milder. These “limited symptom attacks” involve fewer than four symptoms and may last only one to five minutes. They follow the same rapid-onset pattern but don’t reach the same peak intensity. A person prone to panic attacks may experience both full attacks and these shorter episodes at different times.
The Aftermath
Even after the attack itself passes, the person isn’t necessarily fine. The flood of adrenaline leaves the body drained, and many people experience what’s sometimes called a panic attack “hangover.” Common aftereffects include deep fatigue, brain fog, muscle soreness, body aches, lingering chest discomfort, and a general sense of unease. Some people feel shaky or lethargic for hours afterward. In some cases, these residual symptoms can linger for days or even up to a week.
This recovery period is the body regulating itself after an intense stress response. It’s normal, but it can be alarming for someone who doesn’t expect it. If you’re supporting someone after an attack, understanding that they may not bounce back immediately helps you offer more realistic reassurance.
How to Help in the Moment
If you recognize that someone is having a panic attack, your role is simple: stay calm, stay present, and help ground them. Don’t tell them to “just relax” or minimize what’s happening. They can’t think their way out of it, and dismissive language adds shame to an already overwhelming experience.
Start with breathing. Encourage slow, deliberate breaths. Breathing in for four counts, holding briefly, and exhaling for four counts gives them something concrete to follow. Match the rhythm with your own breathing so they have a visual cue.
Grounding techniques can also help redirect attention away from the internal storm. Ask them to name things they can see, hear, or touch. Have them count objects of a specific color in the room, or focus on the texture of something they’re holding. The goal is to pull their awareness back to the present environment and away from the sensations spiraling inside their body.
Speak in short, calm sentences. “You’re safe.” “This will pass.” “I’m right here.” These simple reassurances work better than lengthy explanations. Stay with them until the symptoms clearly begin to ease, and don’t rush them to get up or move on once the peak passes. Give them time to recover at their own pace.