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The Physical Symptoms of Anxiety: Why Does the Body Sound the Alarm?
Most people think of anxiety as a 'thought'; in reality anxiety is experienced most of all in the body: a racing heart, a tightening breath, a churning stomach. These symptoms are not dangerous, but when they are not understood, they turn into a new source of fear in their own right.
The physical symptoms of anxiety (palpitations, shortness of breath, sweating, stomach problems, dizziness) are the physiological consequences of the autonomic nervous system's 'fight-or-flight' response: even when there is no real danger, the body prepares for a threat. These symptoms are uncomfortable but not dangerous. The key in treatment is to understand the mechanism of the symptom and to dissolve the fear of the bodily sensations.
Why does the body go into alarm?
The physical symptoms of anxiety are the product of a system that, in evolutionary terms, saves lives: the 'fight-or-flight' response. When the brain perceives a threat (whether real or perceived makes no difference), the amygdala sounds the alarm, the sympathetic nervous system engages and within seconds the body prepares for danger. Adrenaline is released; the heart beats faster and harder (to pump blood to the muscles), breathing speeds up (to take in oxygen), blood is directed to the large muscles (to flee or fight).
The problem is: this system gives the same response whether a lion is chasing you, or just before you open an e-mail, or for no reason at all. In modern life the threat is usually not physical (work, relationships, worry about the future), but the body makes no distinction: the bodily preparation is triggered in exactly the same way. When you feel palpitations, your body is not breaking down; on the contrary, it is working perfectly, but at the wrong time.
Symptom breeds symptom: the vicious circle
The most insidious thing about anxiety symptoms is that they can amplify themselves. The process runs like this: your heart pounds → you interpret this as 'is something wrong with my heart?' → this interpretation creates a new perception of threat → the amygdala sounds the alarm harder → the palpitations increase. This cycle is the core mechanism of the panic attack. When a bodily sensation is read as evidence of danger, it feeds anxiety; when it is read as a neutral event, it dies down.
That is why the belief about what the physical symptoms mean is more decisive than the symptom itself. Someone who interprets the same palpitations as 'I have been exercising' relaxes; someone who interprets them as 'I am having a heart attack' goes into a panic attack.
Common physical symptoms and their mechanisms
Palpitations and tightness in the chest: the effect of adrenaline on the heart. Uncomfortable, but not harmful to the heart. Shortness of breath and 'not getting enough air': in fact you usually breathe too much (hyperventilation); the carbon dioxide in the blood drops, which causes dizziness and tingling. The paradox: the feeling of 'I cannot breathe' is often the result of over-breathing. Gastrointestinal problems: under stress the digestive system is 'shut down' (blood goes to the muscles); nausea, cramps and diarrhoea are the result. This is why the brain-gut axis is so pronounced in anxiety. Dizziness, a sense of unreality: the result of hyperventilation and of attention turning inward. Trembling, sweating, muscle tension: the body preparing to spring into action.
'Heart attack or anxiety?' The distinction
This is the most common and the most understandable fear. Important principle: newly arising, not previously assessed chest pain must always be medically checked; a diagnosis of anxiety is not made without ruling out a heart problem. Once a medical assessment has been carried out and heart health has been confirmed, the distinguishing patterns are as follows: anxiety-related symptoms usually peak within minutes and then disperse, decrease when attention is directed elsewhere, come with the fear of 'losing control or going mad', and can settle with a breathing exercise. Even so, rather than trying to make this distinction on your own, assessing recurrent symptoms with your huisarts is both a safe and an anxiety-reducing step.
Evidence-based ways of coping with the symptoms
Slow breathing (paced breathing): slowing the breath, especially a long exhalation, activates the parasympathetic system and dampens the physiological alarm. It works with belly breathing, keeping the exhalation longer than the inhalation (e.g. breathe in for 4 seconds, out for 6). Interoceptive exposure: the core of panic treatment; deliberately producing the bodily sensations (spinning on the spot, breathing fast) and experiencing that they are harmless, so that the fear dies out. Cognitive reappraisal: reframing the symptom as an 'overworking alarm' rather than 'danger'. Reducing avoidance: staying away from situations (crowds, exercise, coffee) out of fear of the symptom relieves things in the short term but enlarges the fear in the long term.
Scientific basis: the cognitive model of panic disorder (Clark); research on interoceptive exposure; research on the autonomic nervous system and the brain-gut axis. Newly arising or untreated physical symptoms require a medical assessment first; this article does not replace medical advice.
Frequently asked questions
Do anxiety symptoms harm the body?
No; palpitations, shortness of breath and similar symptoms are uncomfortable but harmless: they are the body's normal alarm response. However, newly arising chest pain should always first be medically assessed.
I feel short of breath, but my tests are normal, why?
In anxiety the feeling of 'not being able to breathe' is usually the result of over-breathing (hyperventilation); the carbon dioxide in the blood drops and this sensation arises. Slowing the breath relieves more than speeding it up.
The symptoms come suddenly, without cause. Is that normal?
It is typical for panic attacks to come without an obvious trigger; the brain can read a bodily sensation (e.g. mild palpitations) as a threat and start the cycle. This does not mean the brain is broken, but that the alarm is going off at the wrong time.
Is medication essential for anxiety symptoms?
For mild to moderate conditions, a CBT-based approach alone is usually sufficient. For moderate to severe conditions, medication is an option and can be combined with therapy; the decision is made together with your huisarts or a psychiatrist.
Clinical boundaries and emergencies
This article is intended solely for general psycho-education and does not replace a diagnosis or personal treatment advice. In the event of an acute crisis, a risk of self-harm or a threat to safety, contact 112 in the Netherlands, your huisarts (general practitioner) or the huisartsenpost (out-of-hours GP service). To talk, the 113 Zelfmoordpreventie helpline (0800-0113) is available day and night.
If you would like support
If the themes in this article noticeably affect your life, you can request an appointment for online Turkish-language therapy or read the frequently asked questions.