What happens physically when we're anxious?
- Tim Arthur
- Jul 31, 2024
- 3 min read
Updated: Jul 22

Anxiety is a common and natural response to stress or perceived threats, but when it becomes chronic or overwhelming, it can significantly impact a person's daily life and well-being. Psychotherapy is a valuable tool in managing anxiety, and understanding the physiological mechanisms behind anxiety can enhance the therapeutic process. This article delves into what happens in the body when people experience anxiety and how psychotherapy can help address these physiological responses.
The Physiology of Anxiety
When faced with a threat or stressor, the body undergoes a series of physiological changes known as the "fight-or-flight" response. This response is an evolutionary mechanism designed to prepare an individual to either confront or flee from danger. Here’s a breakdown of the key physiological processes involved:
1. Activation of the Amygdala: The amygdala, an almond-shaped structure in the brain, plays a crucial role in processing emotions, particularly fear. When a potential threat is detected, the amygdala sends distress signals to other parts of the brain, initiating the anxiety response.
2. Hypothalamus and Sympathetic Nervous System: Upon receiving signals from the amygdala, the hypothalamus activates the sympathetic nervous system. This leads to the release of adrenaline (epinephrine) from the adrenal glands, which rapidly prepares the body for action.
3. Physiological Changes: The release of adrenaline triggers several physiological changes, including:
- Increased Heart Rate: To pump more blood to muscles and vital organs.
- Rapid Breathing: To supply more oxygen to the body.
- Sweating: To cool the body down.
- Muscle Tension: To prepare for physical exertion.
- Dilated Pupils: To improve vision and focus.
4. HPA Axis Activation: The hypothalamus also activates the hypothalamic-pituitary-adrenal (HPA) axis, leading to the release of cortisol, a stress hormone. Cortisol helps maintain the body's alert state but can have detrimental effects if levels remain elevated for prolonged periods.
Chronic Anxiety and Its Effects
While the fight-or-flight response is beneficial in short bursts, chronic anxiety can lead to persistent activation of these physiological mechanisms, resulting in several health issues:
- Cardiovascular Problems: Prolonged increased heart rate and blood pressure can lead to heart disease and other cardiovascular issues.
- Respiratory Issues: Chronic hyperventilation can cause shortness of breath and exacerbate conditions like asthma.
- Immune System Suppression: Elevated cortisol levels can suppress the immune system, making individuals more susceptible to infections.
- Digestive Problems: Anxiety can lead to digestive issues such as irritable bowel syndrome (IBS).
- Mental Health Disorders: Chronic anxiety can contribute to the development of depression and other mental health disorders.
The Role of Psychotherapy in Managing Anxiety
Psychotherapy aims to help individuals understand and manage their anxiety by addressing both the psychological and physiological aspects of the condition. Here are some ways psychotherapy can be beneficial:
1. Cognitive Behavioural Therapy (CBT): CBT helps individuals identify and challenge negative thought patterns and behaviours that contribute to anxiety. By changing these patterns, individuals can reduce their physiological anxiety responses.
2. Exposure Therapy: Gradual exposure to anxiety-provoking situations in a controlled environment can help desensitise individuals to their triggers, reducing the intensity of their physiological responses over time.
3. Mindfulness and Relaxation Techniques: Techniques such as mindfulness meditation, deep breathing, and progressive muscle relaxation can help activate the parasympathetic nervous system, which counteracts the fight-or-flight response and promotes a state of calm.
4. Biofeedback: Biofeedback therapy uses monitoring devices to provide real-time feedback on physiological functions (e.g., heart rate, muscle tension). By becoming aware of these functions, individuals can learn to control them and reduce their anxiety.
5. Psychoeducation: Educating individuals about the physiological mechanisms of anxiety can empower them to understand their symptoms and implement strategies to manage them effectively.
Finally...
Understanding the physiological underpinnings of anxiety provides valuable insights into how psychotherapy can help manage this condition. By addressing both the mind and body, psychotherapy offers comprehensive strategies to reduce anxiety symptoms and improve overall well-being. If you or someone you know is struggling with anxiety, seeking professional help can be a crucial step towards regaining control and enhancing quality of life.