Panic attacks are among the most frightening experiences people have, and the mechanism producing them is well characterised and specific.
The sequence
A physical sensation occurs — a change in heart rate, breathlessness, dizziness, or something else.
It is interpreted as dangerous.
That interpretation triggers the stress response, which produces stronger physical sensations.
Those are interpreted as confirming the danger, which escalates further.
Which is a positive feedback loop, and it produces the rapid escalation people describe.
Why it feels like a medical emergency
The physical symptoms genuinely resemble those of serious conditions.
Chest tightness, racing heart, breathlessness, dizziness, numbness and a sense of unreality.
Which is why people attend emergency departments, and it is why first presentations should be medically assessed rather than assumed.
The interpretation component
What distinguishes a panic attack from the same physical arousal without panic.
Research finds that catastrophic interpretation of bodily sensations is the specific cognitive feature.
Which is why the same physical sensations during exercise do not produce panic — the interpretation differs.
Hyperventilation
A common component that produces several of the symptoms directly.
Overbreathing lowers carbon dioxide, which causes blood vessel constriction, producing dizziness, tingling, visual changes and a sense of not getting enough air.
Which is why the sensation of suffocating occurs alongside breathing more than necessary.
Why it ends
Panic attacks are self-limiting, generally peaking within minutes and subsiding.
Which is because the physiological response cannot be sustained indefinitely — the systems involved exhaust and reset.
Knowing this is itself useful, since the belief that it will continue indefinitely or escalate to something worse drives much of the fear.
Avoidance
What converts isolated attacks into a disorder.
Avoiding situations where attacks occurred prevents learning that they are survivable, and the avoidance expands.
Which is how agoraphobia develops in some cases, through progressive restriction of where a person will go.
Treatment
Cognitive behavioural approaches for panic have substantial evidence and are recommended in clinical guidelines.
The components generally include education about the mechanism, interoceptive exposure — deliberately producing the sensations to learn they are harmless — and reducing safety behaviours.
Medication is also effective and is used alongside or instead depending on preference and severity.
Safety behaviours
Things done to prevent a feared outcome — carrying medication, sitting near exits, having someone accompany you.
Which provide relief and prevent learning, since the absence of catastrophe is attributed to the behaviour.
Reducing them is part of treatment for this reason.
Getting help
A doctor is the appropriate first contact, and this is a common presentation with effective treatment.
First episodes should be assessed medically, since cardiac, thyroid and other conditions produce similar symptoms.
This describes a mechanism and is not clinical advice.
What helps during one
Slow breathing with extended exhalation, which addresses the hyperventilation component directly.
Grounding attention externally rather than on bodily sensations.
Reminding yourself of the mechanism, which interrupts the catastrophic interpretation.
And staying in the situation where possible, since leaving reinforces the association.
Nocturnal panic
Attacks occurring during sleep, waking the person.
Which is reported by a substantial proportion of people with panic disorder and is frequently mistaken for a cardiac event.
The mechanism appears similar, with bodily sensations during sleep triggering the same sequence.
Distinguishing from other conditions
Cardiac arrhythmias, thyroid disorders, low blood sugar, asthma and several other conditions produce overlapping symptoms.
Which is why first episodes should be assessed medically rather than assumed, and why recurrent episodes with new features warrant review.
Supporting someone
Staying calm, speaking slowly, not crowding them, and not insisting they explain during the episode.
Which is what people report as helpful, and instructions to calm down are consistently reported as unhelpful.
Prevalence
Isolated panic attacks are common in the general population, with a substantial proportion of people experiencing at least one.
Which is worth knowing, since the experience is frequently assumed to be rare and shameful.
Panic disorder, involving recurrent attacks and persistent worry about them, is less common and is highly treatable.
Triggers
Frequently identifiable and sometimes not, with attacks occurring without apparent cause being common.
Which is disconcerting and does not indicate anything worse.
Caffeine, sleep deprivation, alcohol withdrawal and certain medications can all precipitate them.
Recovery time
The peak passes within minutes, and feeling shaken for hours afterwards is normal.
Which is the aftermath of a substantial physiological event rather than a continuation of it.
Agoraphobia
Avoidance of situations where escape would be difficult or help unavailable.
Which develops in a proportion of people with panic disorder and can become severely restricting.
Exposure-based treatment is effective and works by graded return to avoided situations, and it is considerably more successful than the severity of the condition suggests.
Which is why early treatment matters, before avoidance has established and expanded.
Doctors encounter this routinely and treatment is generally straightforward.