Your heart suddenly starts racing.
Your chest feels tight.
You cannot seem to get enough air.
Your hands shake. You feel dizzy or nauseous. Something feels terribly wrong.
Then comes the thought:
“Am I having a heart attack?”
Or:
“I’m going to faint.”
“I’m losing control.”
“I’m going to die.”
A panic attack can be frightening precisely because the experience is both psychological and intensely physical. The sensations are real. The fear is real. And when the attack comes without an obvious reason, it can feel as though the body has suddenly turned against you.
Panic attack symptoms typically appear quickly and may include a racing heart, sweating, trembling, difficulty breathing, chest discomfort, dizziness, nausea, tingling, feelings of unreality and an intense fear of losing control or dying. Symptoms often reach their highest intensity within minutes. Cleveland Clinic
Having one panic attack does not necessarily mean that you have panic disorder. But recurring panic attacks, persistent fear of another episode and changes in your behaviour to prevent future attacks can become a cycle that significantly restricts everyday life. MSD Manuals
Understanding what is happening is often the first step towards breaking that cycle.
Panic attack symptoms: what exactly is a panic attack?
A panic attack is a sudden surge of intense fear or discomfort accompanied by strong physical and psychological sensations.
It can happen when you are already anxious, but it may also appear when you feel relatively calm. Sometimes there is an obvious trigger. Sometimes there appears to be none at all.
Psychology Tools describes panic as an intense activation of the body’s threat system – essentially a fight-or-flight response occurring when the brain perceives danger. The difficulty is that this alarm system can be activated even when there is no immediate external threat.
That helps explain why a panic attack feels so convincing.
If your brain believes you are in danger, your body responds accordingly.
Your heart beats faster.
Your breathing changes.
Your muscles prepare for action.
Your attention becomes intensely focused on possible threats.
The sensations themselves can then become the threat.
You notice your heart beating quickly and think:
“Something is wrong with my heart.”
That thought produces more fear.
More fear produces greater physical activation.
The heart beats faster.
The sensation now seems to confirm the original fear.
This can create a powerful feedback loop:
physical sensation → catastrophic interpretation → fear → stronger physical sensation → more catastrophic interpretation.
Panic attack symptoms: what are the most common physical and psychological signs?
The physical panic attack symptoms can be dramatic. They may resemble symptoms associated with cardiac, respiratory, neurological or other medical conditions, which is one reason first attacks often lead people to seek urgent medical care.
Common panic attack symptoms include:
- panic attack heart palpitations, a pounding or accelerated heartbeat;
- panic attack chest pain, pressure, tightness or discomfort;
- panic attack shortness of breath, rapid breathing or a feeling of being unable to get enough air;
- panic attack dizziness, light-headedness, unsteadiness or feeling faint;
- panic attack shaking or trembling;
- panic attack nausea, stomach discomfort or abdominal distress;
- sweating, chills or hot sensations;
- numbness or tingling;
- a choking or smothering sensation;
- panic attack derealization, where the surroundings may seem unreal or strange;
- depersonalisation, or feeling detached from yourself;
- panic attack fear of losing control;
- panic attack fear of dying.
These panic attack symptoms are consistently described across clinical sources including the MSD Manual, Cleveland Clinic and Psychology Tools.
Not everyone experiences every one of these panic attack symptoms.
And having one or two of these sensations does not automatically mean you are having a panic attack.
Context, timing, severity and medical history matter.
Panic attack symptoms: why do heart palpitations feel so frightening?
Few physical sensations attract attention as quickly as a change in heartbeat.
You may notice:
“My heart skipped.”
“It suddenly started racing.”
“I can feel it pounding.”
Then you check again.
You place your fingers on your pulse.
You look at your smartwatch.
You count the beats.
The more carefully you monitor the heart, the more aware you become of variations that you might normally never notice.
Meanwhile, anxiety itself activates the sympathetic nervous system and can increase heart rate.
The result can become circular:
palpitation → attention to the heart → fear → faster heartbeat → stronger palpitation → more fear.
This is particularly important when panic attack symptoms overlap with health anxiety, sometimes still called hypochondria.
A person may not simply fear the panic attack itself. They may interpret the physical sensation as proof of heart disease.
That distinction matters in treatment because the problem may involve both panic and a persistent fear of illness.
Panic attack symptoms: why can chest pain and chest tightness occur?
Chest sensations are among the most frightening panic attack symptoms.
Anxiety can affect breathing, increase muscle tension and alter the way bodily sensations are perceived. This can contribute to chest discomfort, tightness or pain.
But there is an essential safety distinction.
Chest pain should not automatically be labelled anxiety.
The MSD Manual notes that panic attack symptoms can resemble serious medical conditions and recommends medical evaluation when symptoms are severe or persistent. The NHS likewise emphasises that symptoms associated with panic can also occur in other conditions.
If chest pain or pressure is new, severe, persistent, occurs with significant breathing difficulty, fainting, confusion or other concerning symptoms, seek urgent medical assessment.
If you are in Portugal and believe you may be experiencing a medical emergency, call 112.
The aim of psychological treatment is not to teach people to ignore potentially important physical symptoms.
It is to help them respond proportionately once appropriate medical causes have been considered.
Panic attack symptoms: why does shortness of breath happen?
During anxiety, breathing may become faster or shallower.
Some people begin consciously trying to “get enough air”. They take larger breaths, monitor each inhalation and repeatedly test whether their lungs feel normal.
This can make breathing feel even stranger.
You may think:
“I cannot breathe properly.”
That creates fear.
The fear changes breathing further.
Now the sensation appears to confirm the thought.
This is why panic attack shortness of breath can feel so convincing even when the body’s alarm system, rather than an immediate external danger, is driving the experience.
Psychology Tools describes shortness of breath or smothering sensations as common panic attack symptoms and explains how catastrophic interpretations of bodily sensations can intensify the fight-or-flight response.
Again, significant or unexplained breathing problems deserve medical assessment. Anxiety should never be used as a blanket explanation for new respiratory symptoms.
Panic attack symptoms: what do dizziness, shaking and nausea mean?
When the threat system activates, the effects are not limited to the heart and lungs.
Some people experience panic attack dizziness and feel light-headed, unsteady or close to fainting.
Others notice panic attack shaking, trembling or sweating.
And panic attack nausea can make the stomach feel unsettled or painful.
These panic attack symptoms can create their own catastrophic interpretations:
“If I am dizzy, I must be about to faint.”
“If I am shaking, I am losing control.”
“If I feel sick, something serious must be happening.”
But the interpretation can amplify the sensation.
This does not mean the symptom is imaginary.
The physical experience is real.
The psychological component lies partly in what the brain concludes that sensation means.
That is one reason cognitive behavioural approaches focus not only on reducing anxiety, but on changing the relationship between bodily sensations, interpretations and avoidance.
Panic attack symptoms: what are derealization and fear of losing control?
Some of the strangest panic attack symptoms are not painful at all.
They are changes in perception.
During panic attack derealization, the world may suddenly feel distant, dreamlike or unreal.
With depersonalisation, you may feel disconnected from yourself or as though you are observing yourself from outside.
Because the sensation is unfamiliar, a new thought can appear:
“I’m going crazy.”
Or:
“I am losing control of my mind.”
Fear then escalates.
The MSD Manual, Cleveland Clinic and Psychology Tools all include feelings of unreality, detachment and fear of losing control among recognised panic attack symptoms.
The experience may be deeply unsettling.
But feeling detached or unreal during intense anxiety is not, by itself, evidence that you are “going mad”.
A clinical assessment can help distinguish panic-related symptoms from other psychological or medical problems when there is uncertainty.
Panic attack symptoms: why can the fear of dying feel completely real?
One of the defining features of severe panic is not simply anxiety.
It is catastrophe.
“I am going to die.”
The person is often not saying this metaphorically.
At that moment, death may feel imminent.
Psychology Tools explains how panic can escalate when bodily sensations are interpreted catastrophically. A racing heart becomes “heart attack”; dizziness becomes “I will collapse”; unusual mental sensations become “I am losing control”. The brain then treats these interpretations as further evidence of danger, amplifying the physical response.
This gives us an important insight into panic attack fear of dying.
It is not useful simply to tell someone:
“Stop worrying.”
At the peak of panic, the body’s threat system is behaving as if the danger were real.
Treatment therefore involves learning what the sensations mean, challenging catastrophic predictions and changing the behaviours that keep the alarm cycle alive.
Panic attack symptoms: how long does a panic attack last?
People frequently search “how long does a panic attack last” because time feels distorted during intense panic.
Five minutes can feel like half an hour.
Clinical sources generally describe panic attacks as relatively brief, with symptoms escalating quickly and often peaking within around ten minutes. Cleveland Clinic reports that attacks commonly last about 5 to 20 minutes, although some people report longer episodes.
Psychology Today similarly describes attacks as generally lasting around 5 to 20 minutes and reaching their highest intensity quickly.
That does not mean anxiety disappears instantly afterwards.
A person may remain shaken, exhausted or worried for much longer.
They may also experience several surges close together, which can create the impression of one very long attack.
Panic attack symptoms: what causes panic attacks?
There is rarely one simple answer to “what causes panic attacks?”
Some attacks occur during periods of intense stress.
Some happen in response to specific fears.
Some occur alongside other anxiety conditions, depression, trauma-related difficulties or other mental health problems.
Some appear unexpectedly.
Psychology Tools highlights several factors that may increase vulnerability, including high stress, increased sensitivity to bodily sensations, strong biological stress responses and catastrophic interpretations of physical experiences.
Substances and physical conditions can also matter. For example, caffeine, alcohol or certain drugs may contribute to panic attack symptoms in some people, and medical conditions can sometimes produce sensations resembling panic. Psychology Today and the MSD Manual therefore stress the importance of considering both physical and psychological explanations.
Often, once panic has begun recurring, the more useful question becomes not:
“What caused the very first attack?”
but:
“What is keeping the cycle going now?”
Panic attack symptoms: panic attack vs anxiety attack – what is the difference?
The search “panic attack vs anxiety attack” is common because the expressions are often used interchangeably in everyday language.
They are not quite the same.
A panic attack typically involves a sudden, intense surge of fear accompanied by marked physical and psychological symptoms that escalate rapidly.
Anxiety can be more gradual and may remain connected to a continuing worry or situation.
For example, you may spend hours worrying about an examination, a medical result or a work meeting. That anxiety can be severe without necessarily becoming a discrete panic attack.
Panic, by contrast, often has a distinct feeling of escalation:
“Something terrible is happening right now.”
In clinical practice, it is more useful to explore the actual pattern than to rely only on labels: how quickly symptoms develop, what physical sensations occur, what you fear will happen and what you do in response.
Panic attack symptoms: panic attack vs heart attack – how can you tell?
The question “panic attack vs heart attack” needs particular care.
Both can involve chest discomfort, sweating, breathlessness, nausea and an increased awareness of the heart.
That overlap is precisely why a person should not attempt to diagnose new or severe chest symptoms through an online article.
Some popular descriptions offer simple rules such as “panic pain feels like this” and “heart attack pain feels like that”. Real clinical presentations are not always so neat.
A safer principle is this:
If you are experiencing new, severe, persistent or otherwise concerning chest pain, especially with substantial shortness of breath, fainting, marked weakness or other worrying symptoms, seek urgent medical assessment.
Once relevant medical causes have been evaluated, recurrent episodes with a consistent panic pattern can then be addressed psychologically.
The MSD Manual explicitly notes that serious physical conditions can share symptoms with panic and that clinicians may need to exclude medical causes before diagnosing panic disorder.
Panic attack symptoms: how are panic attacks linked to health anxiety and hypochondria?
A panic attack can end in twenty minutes.
The fear about what it meant can last for months.
Imagine that your first attack included chest tightness and palpitations.
You were examined medically and no dangerous cardiac problem was found.
For several days you feel reassured.
Then you notice another unusual heartbeat.
Immediately:
“What if they missed something?”
You check your pulse.
Search symptoms online.
Read about arrhythmias.
Your anxiety rises.
The heart races.
Now it feels as though the feared illness has been confirmed.
This is where panic can overlap with health anxiety, historically often called hypochondria.
The person becomes highly alert to bodily sensations and may repeatedly check, research, seek reassurance or request medical evaluations.
These behaviours make sense: they are attempts to feel safe.
But if reassurance lasts only briefly, the strategy can begin to maintain the anxiety.
Treatment then needs to address not only the panic itself but also the cycle of monitoring, catastrophic interpretation and reassurance-seeking.
Panic attack symptoms: when do recurring panic attacks become panic disorder?
A single panic attack does not equal panic disorder.
Panic disorder involves repeated unexpected attacks together with ongoing worry about having more attacks or meaningful behavioural changes designed to avoid them.
The NHS describes panic disorder as regular, unexpected panic attacks followed by persistent concern about further attacks. The MSD Manual similarly emphasises continuing worry or avoidance after recurrent unexpected attacks.
Typical panic disorder symptoms therefore extend beyond the attack itself.
You may start asking:
“Where is the nearest exit?”
“What if it happens on the train?”
“What if nobody can help me?”
You avoid crowded places.
Stop exercising because an increased heart rate reminds you of panic.
Only travel with someone you trust.
Sit near doors.
Avoid being far from hospitals.
These strategies may reduce anxiety in the short term.
But they can also teach the brain:
“I survived because I escaped or avoided the situation.”
The world becomes smaller.
That is often when professional help becomes especially valuable.
Panic attack symptoms: how does CBT for panic attacks work?
CBT for panic attacks – cognitive behavioural therapy – is one of the best-supported psychological treatments for panic disorder.
CBT examines the relationship between bodily sensations, thoughts, emotions and behaviour.
A simplified example might look like this:
You feel your heart accelerate.
You think:
“Heart attack.”
Fear rises.
You sit down, check your pulse and leave the situation.
The fear eventually decreases.
Your brain may conclude:
“I was in danger, and checking and escaping saved me.”
Next time the heart accelerates, the alarm appears even faster.
CBT aims to interrupt this cycle.
Treatment may involve education about the body’s threat response, identifying catastrophic interpretations, behavioural experiments, gradually reducing safety behaviours and exposure to feared sensations or situations. Psychology Tools describes these as central components of evidence-based CBT for panic.
The MSD Manual also describes interoceptive exposure, in which people safely and deliberately encounter physical sensations associated with panic so that they can learn that the sensations themselves do not necessarily signal catastrophe.
The aim is not:
“I must make sure I never feel my heart race.”
It becomes:
“My heart can race and I do not have to interpret that sensation as immediate disaster.”
Panic attack symptoms: is medication sometimes used?
Yes.
For some people with panic disorder, medication may be considered as part of treatment. The decision belongs to a medical professional and depends on symptoms, severity, clinical history, other conditions and the person’s preferences.
The NHS lists talking therapies, particularly CBT, and medication among the principal treatments for panic disorder.
Psychology and medical treatment are not mutually exclusive.
Some people benefit from psychotherapy alone.
Others may benefit from a combination.
At Sua Clínica, the focus is psychological care. Where medication or psychiatric assessment appears clinically appropriate, medical referral should be considered.
Panic attack symptoms: when should you seek professional help?
You do not have to wait until panic controls your life.
Psychological support may be useful when attacks are recurring, when you constantly fear the next episode, when you avoid places or activities because of panic, or when your everyday decisions are increasingly organised around preventing an attack.
It is also worth seeking help if health anxiety has developed around panic attack symptoms – for example, if you repeatedly monitor your heart, search illnesses online, seek reassurance or continue fearing serious disease after appropriate medical assessment.
The NHS recommends seeking professional help when symptoms of panic disorder are present, and a clinician may also assess whether another medical or psychological condition could better explain them.
Urgent medical symptoms are different. New or severe chest pain, significant breathing difficulty, fainting, neurological symptoms or other signs of possible medical emergency should be assessed promptly rather than assumed to be panic.
In Portugal, call 112 in an emergency.
Panic attack symptoms: how Sua Clínica can help
At Sua Clínica, psychological support can help you understand your panic attack symptoms and what happens before, during and after panic episodes: the physical sensations, the thoughts attached to them, the behaviours used to feel safe and the avoidance that may gradually be limiting your life.
Treatment can address panic attack symptoms, recurring panic attacks, anxiety, health anxiety, fear of physical symptoms and related difficulties. CBT for panic attacks may be particularly appropriate in some cases because it works directly with catastrophic interpretations, avoidance and the cycle that maintains panic.
At the time of writing, Sua Clínica provides Psychology consultations online by video call, throughout Portugal and for people living abroad, while its Cascais clinic is being remodelled for reopening in November.
If you are unsure which psychologist to choose, you can also speak to Sofia, Sua Clínica’s AI assistant. You can describe what you are experiencing in your own words – for example, “I keep having panic attacks” or “I feel chest tightness and I am constantly afraid something is wrong with my heart” – and Sofia can help identify the relevant service, match you with an appropriate psychologist and assist with booking. Sofia is a navigation and booking tool; it does not replace professional clinical assessment.
Panic attack symptoms: the most important thing to remember
Panic attack symptoms are physical as well as psychological.
Heart palpitations can be real.
Chest tightness can be real.
Breathlessness can be real.
Dizziness, shaking and nausea can be real.
And the terror can be very real.
What panic changes is often not whether the body is producing a sensation, but what that sensation comes to mean.
A faster heartbeat becomes:
“My heart is failing.”
Dizziness becomes:
“I will faint.”
A feeling of unreality becomes:
“I am losing my mind.”
The interpretation increases fear, and fear intensifies the physical response.
That is how a few seconds of bodily discomfort can become a full panic attack.
And after the attack, another cycle can begin:
“What if it happens again?”
You avoid.
Check.
Monitor.
Escape.
Seek reassurance.
Eventually, the fear of the next panic attack can become more restrictive than the attack itself.
The good news is that this cycle can be understood and treated. CBT and exposure-based approaches have strong clinical support for panic disorder, while appropriate medical assessment helps rule out physical causes when symptoms warrant it.
If recurring panic attacks or panic attack symptoms such as fear of dying, chest sensations, shortness of breath or constant health worries are affecting the way you work, travel, socialise or live, you can book a Psychology consultation with Sua Clínica.
The aim is not to convince yourself that you will never feel anxiety again.
It is to reach a point where a sensation no longer automatically becomes a catastrophe – and where fear of the next panic attack no longer decides where you go, what you do or how you live.