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Physical symptoms of anxiety & hyperventilation!

Written by a myTherapist Scientific Contributor | Eleni Nanou
Physical symptoms of anxiety & hyperventilation!

Have you ever felt your heart pounding for no obvious reason, as if you can’t take a “deep breath,” as if everything around you is suffocating you and your mind is filling with fear? You may try countless ways to calm down, yet your body seems to ignore you. If so, you’re not alone. In a world that moves faster than ever, many of us don’t recognize when our body is trying to warn us. Anxiety takes many forms that we often can’t identify, and we may experience it as something dangerously threatening. What is the difference between anxiety and an anxiety disorder? What is hyperventilation, and how is it connected to our mental health? And most importantly, how can we manage anxiety with simple techniques such as diaphragmatic breathing?

What anxiety really is?

Anxiety is a normal, evolutionarily useful response that prepares us for action. It isn’t only a psychological experience; it is a mind-body state that affects the entire organism and its systems.

How anxiety affects the body and the mind?

  • In the nervous system: There is overstimulation of the autonomic nervous system, mainly the sympathetic branch. The brain is on alert, which can lead to irritability, hyperfocus, or the opposite, distractibility.
  • In the cardiovascular system: Blood pressure and heart rate increase, which over time can affect the heart.
  • In the respiratory system: Overbreathing appears, causing hypocapnia (reduced carbon dioxide) and reduced oxygen delivery to the brain.
  • In the digestive system: Indigestion, irritable bowel, nausea, or loss of appetite may appear.
  • In the hormonal system: Prolonged release of cortisol and adrenaline, which exhaust the body.
  • In the immune system: Suppression of defenses, making us more vulnerable to infections.

Anxiety symptoms in the body

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Anxiety shows up in many physical ways:

  • Neck or shoulder pain
  • Digestive problems and irritable bowel
  • Fatigue, insomnia, tightness in the chest
  • Muscle twitching and tics
  • Headaches
  • Numbness or tingling
  • A sensation of heat
  • Trembling
  • Fear of death or an intense fear that the worst will happen
  • Fainting
  • Shortness of breath
  • A feeling of unsteadiness

 

These physical expressions are often misunderstood and lead many people to unnecessary medical tests, without a clear organic cause. It’s important to know that when we perceive a threat, real or imagined, our body releases cortisol and adrenaline, increases heart rate, increases blood flow to the muscles, and speeds up breathing. Many times, however, anxiety causes discomfort, uncontrollable tension, and is often accompanied by a less well-known but very common phenomenon: overbreathing, also known as hyperventilation. How exactly is anxiety connected to hyperventilation, and how can we deal with it?

🤔 Could it be that your body is trying to speak to you, and it’s time to listen? If you feel that something inside you isn’t right, without knowing exactly what, it may not be physical but psychological. Talk to a certified psychologist today, easily and safely online.

Anxiety and Hyperventilation: When our breath becomes a source of anxiety

Hyperventilation is observed in many, and perhaps most, people with anxiety disorders, and not only. It is a state in which a person breathes faster or deeper than their body needs. It usually happens in response to intense anxiety, fear, or panic. Anxiety isn’t always “in our mind.” It often expresses itself through the body, and one of the most characteristic physical reactions is hyperventilation, also called overbreathing, meaning excessive and shallow breathing. The body, believing it is in danger, activates its “alarm” and leads us to breathe rapidly, often without realizing it. At a mild level, anxiety can mobilize us and help us perform better. In everyday life, we experience situational or productive anxiety, which is relatively controlled and short-lived, when we face a difficult situation and enter a state of heightened alertness. But when it is frequent, intense, and prolonged, it becomes chronic anxiety or an anxiety disorder.

What really happens when we feel we can’t catch our breath?

With hyperventilation, carbon dioxide in the blood decreases, causing dizziness, numbness, rapid heartbeat, and even the feeling that we might faint. All of this can intensify anxiety even more, creating a vicious cycle: the sensation of breathlessness and physical discomfort increases anxiety, which in turn intensifies breathing difficulty. In practice, when a person is in anxiety and stress, they tend to take more than 12 breaths per minute, resulting in more oxygen than they need and less carbon dioxide. Essentially, it feels as if the air doesn’t “fill” you. In reality, however, it’s not true that you don’t have oxygen. Because of the speed of breathing, you may have felt that you might faint or die, without an obvious organic reason. Hyperventilation is not dangerous, but in the long term it can feel very frightening and destabilizing.

Can anxiety be “normal”? And how does it work?

Anxiety is a sign of the body’s alertness and is accompanied by:

  • A temporary increase in heart rate
  • A feeling of tension or worry
  • Focused attention on the problem
  • It subsides once the stressful situation passes

 

If anxiety is temporary, it helps with problem-solving and does not seriously affect daily functioning. You’ve certainly experienced a demanding task at work, or a meeting that unsettles you. This is what we call productive anxiety, where you push yourself into heightened activation to succeed without harmful consequences.

Can anxiety turn into an Anxiety Disorder? How to recognize the signs

An anxiety disorder is much more than simple stress. It differs from everyday anxiety. It is a psychological condition in which anxiety is disproportionate to the situation, causes significant distress, and negatively affects daily life.

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Forms of anxiety disorder:

  • Generalized anxiety disorder (GAD): Excessive worry and intense anxiety about almost anything that happens.
  • Panic disorder: Sudden episodes of intense anxiety.
  • Social anxiety disorder: Fear of social situations.
  • Post-traumatic stress disorder (PTSD): A mental disorder that appears after exposure to a traumatic event, such as violence, an accident, or a natural disaster.

 

General symptoms of an Anxiety Disorder

  • Intense and persistent anxiety, even without an obvious cause.
  • Physical symptoms: rapid heartbeat, overbreathing, insomnia, dizziness, muscle tension, heavy sweating.
  • Obsessive worries that make concentration or sleep difficult.
  • Avoidance of situations out of fear that “something bad will happen.”

 

These signs need to last for six months or more in order to be diagnosed as a disorder. An anxiety disorder significantly interferes with daily life, relationships, and work, reducing our functioning and psychological resilience. Many times, anxiety looks similar from person to person, but we need to pay attention to its frequency and intensity.

👉 Do these signs feel familiar to you and bother you every day? Don’t let anxiety take control of your life. Book your first online session today and discover how you can feel safe within yourself again.

Anxiety and Diaphragmatic Breathing

Diaphragmatic breathing, also called abdominal breathing, is a natural way of breathing that we use when we are calm, such as when we sleep. In contrast to shallow chest breathing, which is often triggered by anxiety, diaphragmatic breathing activates the parasympathetic nervous system, the body’s “brake.” Its importance is significant because it helps a person reduce breaths per minute to about 8 to 12, and regulate other physical symptoms through correct, appropriate breathing through the nose rather than the mouth. In addition, through relaxation techniques, self-hypnosis, and calming practices, the body is trained to breathe less and more gently. More specifically, diaphragmatic breathing:

  • Reduces cortisol levels (the stress hormone).
  • Improves heart rate variability (an indicator of good adaptation to stress).
  • Increases calm and concentration.
  • Reduces physical symptoms of anxiety, such as rapid heartbeat and overbreathing.

Anxiety and Diaphragmatic Breathing

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  • Find a quiet place and sit or lie down comfortably. Place one hand on your chest and the other on your abdomen. Practice breathing exercises that help you relax and breathe from the diaphragm and abdomen, rather than from the chest wall.
  • Inhale through your nose for 4 seconds, aiming for your abdomen to rise, not your chest.
  • Hold your breath for 2 seconds.
  • Begin to exhale slowly through your mouth for 6 seconds, imagining you are gently blowing through a straw.
  • Repeat for 2 to 5 minutes.
  • Practice relaxation techniques regularly, such as progressive muscle relaxation or meditation, which help gradually.

Anxiety and childhood

Childhood is critical in shaping our relationship with anxiety. Intense or chronic experiences of anxiety, such as harshness, rejection, or school bullying, affect brain development and increase the likelihood of anxiety disorders in adulthood. People who grew up with excessive stress or insecurity are more prone to developing heightened tension, overanalyzing situations, and fearing failure. In addition, the re-emergence of a traumatic event can trigger and intensify anxiety.

What research shows us

According to Meuret et al. (2010), regulating carbon dioxide through breathing dramatically improves panic symptoms.

Gardner (1996) notes that chronic overbreathing is responsible for dozens of unexplained physical symptoms that often lead patients to medical testing without a clear pathological basis.

Klein’s (1993) “false suffocation alarm” theory explains why the brain interprets a change in breathing as an imminent threat, accelerating an anxiety episode.

Studies also show that “diaphragmatic breathing can be a key component in psychotherapeutic interventions for anxiety disorder,” according to Zaccaro et al. (2018).

Conclusions

Anxiety is not weakness, nor a “quirk.” It is a biological and psychological state that deserves understanding, acceptance, and care. When addressed with the right tools, such as support, new habits, and psychotherapy, it can become an opportunity for deep personal transformation. Anxiety accompanies us almost always; it is completely normal, but when it permanently dominates our lives, it gradually affects our mental and physical health. Understanding hyperventilation and learning diaphragmatic breathing can be the first step toward balance. Along with support from mental health professionals, it is possible to make anxiety an ally rather than an enemy. To observe it without fear, to understand the signs, and to accept them. To find coping strategies that fit our temperament and to regain our rhythm and inner calm. With the right access, you can be in a position to consciously deepen your connection with your inner self. You are certainly not the only one who feels this way, and it’s ok!

🧠 Wondering whether your anxiety goes beyond normal limits? Take the free Anxiety Test on our platform and discover where you stand.

Bibliography

  • Ma, X. et al. (2017). The effect of diaphragmatic breathing on attention, negative affect and stress. Frontiers in Psychology, 8, 874. https://doi.org/10.3389/fpsyg.2017.00874
  • Zaccaro, A. et al. (2018). How breath-control can change your life. Frontiers in Human Neuroscience, 12, 353.
  • Jerath, R. et al. (2006). Physiology of long pranayamic breathing. Medical Hypotheses, 67(3), 566–571.
  • Kathimerini. (2023). Take a breath: The science behind breathing and relaxation.
  • CBT.edu.gr. (n.d.). The importance of diaphragmatic breathing in stress management.
  • Hellenic Psychological Society. (2022). Anxiety in the modern world.
  • WHO. (2022). Anxiety disorders – World Health Organization.
  • Meuret, A. E., Wilhelm, F. H., Ritz, T., Roth, W. T. (2010). Feedback of end-tidal pCO₂ as a therapeutic approach for panic disorder. Journal of Psychiatric Research, 44(8), 468–476. https://doi.org/10.1016/j.jpsychires.2009.10.009
  • Klein, D. F. (1993). False suffocation alarms, spontaneous panics, and related conditions: An integrative hypothesis. Archives of General Psychiatry, 50(4), 306–317. https://doi.org/10.1001/archpsyc.1993.01820160038005
  • Gardner, W. N. (1996). The pathophysiology of hyperventilation disorders. Chest, 109(2), 516–534. https://doi.org/10.1378/chest.109.2.516
  • Rapee, R. M. (1995). Descriptive psychopathology of panic disorder with anticipatory anxiety. Clinical Psychology Review, 15(6), 429–450. https://doi.org/10.1016/0272-7358(95)00024-0
  • Lum, L. C. (1981). Hyperventilation: The Tip and the Iceberg. Journal of Psychosomatic Research, 25(4), 275–283. https://doi.org/10.1016/0022-3999(81)90045-2
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