What Happens During a Panic Attack—and Why

What happens during a panic attack?

You may be dealing with a racing heart, tight chest, dizziness, or a sudden fear that something is seriously wrong. Understanding what happens during a panic attack can make these sensations less mysterious and easier to address. This guide explains how your brain launches the alarm, why the physical symptoms feel so severe, how fear keeps them going, and what you can do in the moment. It also covers when chest pain needs urgent medical attention and how therapy can help break the cycle.

The neurological alarm: How the surge begins

A panic attack begins when your brain detects danger, even if no external threat is present. The amygdala, which helps process threats, alerts the hypothalamus. The hypothalamus then activates the sympathetic branch of your autonomic nervous system, launching the fight-or-flight response.

Your adrenal glands release adrenaline and related stress chemicals. Your attention narrows, your muscles tense, and your heart and breathing speed up as your body prepares to respond to an emergency.

The response can arrive abruptly while you are driving, working, resting, or sleeping. According to the National Center for Biotechnology Information, panic reaches peak intensity within minutes. That speed is one reason it can feel as though your body has changed without warning.

The physical cascade: Racing heart, chest pain, and overbreathing

At Blackwell Counseling & Coaching, I treat panic attacks as intense physical experiences, not simply worried thoughts. Adrenaline increases your heart rate and the force of each contraction. You may notice pounding, skipped-beat sensations, sweating, trembling, or shaky limbs.

Your chest and shoulder muscles may tighten while your rib cage moves rapidly. That combination can create pressure, soreness, or sharp localized pain. It may also feel as though you cannot take a satisfying breath, prompting you to breathe faster or more deeply.

Overbreathing removes carbon dioxide from your blood faster than your body produces it. The resulting changes can constrict blood vessels supplying the brain, causing lightheadedness, blurred vision, tingling, numbness, or feelings of unreality. The European Society of Medicine reports that this can reduce cerebral blood flow by 30% to 40%.

Your hands or feet may also feel cold, numb, or tingly. These are real effects of an activated alarm system, not signs that you are imagining the attack.

Panic versus a cardiac event

Chest pain from panic and pain from a cardiac event can overlap. Do not try to diagnose the difference based only on how frightened you feel. Panic commonly involves a rapid rise in fear, fast breathing, tingling, trembling, and symptoms that begin to ease as the alarm response settles.

A heart attack more often causes heavy, squeezing, or crushing pressure that may spread into an arm, the jaw, neck, shoulder, or upper back. It may persist despite rest or slower breathing and can occur with fainting, sweating, nausea, or continuing shortness of breath. UR Medicine notes that cardiac discomfort commonly lasts longer and does not subside with breathing exercises.

Call 911 if chest pain is new or severe, radiates into your arm, jaw, or back, or appears with fainting, blue or gray lips, or persistent trouble breathing. First-time unexplained chest pain or breathlessness also needs prompt medical evaluation. Even if you have experienced panic before, do not automatically label an unusual symptom as another attack.

The feedback loop: How fear feeds physical sensations

Once the first sensations appear, your interpretation affects what happens next. A strong heartbeat may trigger the thought, “I am having a heart attack.” Dizziness may become, “I am about to pass out.” Shortness of breath may feel like proof that you are suffocating.

I help clients recognize the feedback loop this creates. A sensation causes fear. Fear tells the brain there is more danger, prompting further physical arousal. The stronger sensations then appear to confirm the frightening thought.

The goal is not to pretend the symptoms are comfortable. It is to identify them more accurately: “My alarm system is active. Adrenaline is making my heart beat harder. Fast breathing is making me dizzy. This response can settle.” That change in meaning removes fuel from the cycle. My panic disorder care addresses both the physical response and the fearful thoughts that keep it going.

In-the-moment regulation: Grounding and steadier breathing

During an attack, forcing a huge breath can worsen overbreathing. Instead, relax your shoulders and breathe quietly into your abdomen. Let the exhale remain gentle and slightly longer than the inhale. Aim for smooth, comfortable breathing rather than trying to fill your lungs completely.

A sensory grounding exercise can shift attention away from internal danger signals. Name five things you can see, four things you can feel, three sounds, two scents, and one taste. Describe each item plainly so your brain has concrete information about your present surroundings.

You can also press both feet into the floor, release your jaw, or walk slowly if the setting is safe. I use breathing, grounding, and physical movement to help clients settle the nervous system. If you need options that will not draw attention during a meeting, deposition, or workday, see these discreet panic tools for work.

If a technique makes you more lightheaded or distressed, stop and return to ordinary breathing. The immediate aim is to reduce escalation while allowing the alarm response to settle.

Long-term recovery with CBT and coordinated care

Repeated attacks can lead you to monitor your body constantly or avoid exercise, travel, meetings, and crowded places. That avoidance brings short-term relief, but it can reinforce the belief that the situation or sensation was dangerous.

At Blackwell Counseling & Coaching, I use Cognitive Behavioral Therapy to identify catastrophic predictions and develop more accurate responses to physical sensations. CBT may also include interoceptive exposure, in which safe sensations resembling panic are introduced gradually in a controlled therapeutic setting. This helps the brain learn that a faster heartbeat, warmth, or mild dizziness does not automatically signal disaster.

I pair this work with practical strategies such as structured breathing, physical movement, sleep support, and stress management. I look for triggers and root causes rather than addressing only surface symptoms. If medication may be useful alongside psychotherapy, I coordinate with your medical doctor or psychiatrist; I do not prescribe or manage psychiatric medication.

I am a licensed clinical social worker and the first clinician in the nation to earn the Certified Lawyer Therapist™ designation. That specialized background can be especially relevant when panic is tied to court appearances, deadlines, perfectionism, or the pressure to remain composed in legal work.

Take the next step with Blackwell Counseling & Coaching

If panic attacks are recurring or shrinking your daily life, I am currently accepting new telehealth clients. Contact Blackwell Counseling & Coaching, call (860)-534-1698, or email counseling@larryblackwellcounseling.com to schedule confidential online therapy. I work online from Manchester, CT, with clients living in Connecticut, Massachusetts, Rhode Island, Pennsylvania, and New York.