Why anxiety feels overwhelming: understanding the anxiety cycle

Many people experience anxiety at some point in their lives. Anxiety is a natural and important human response designed to help us recognise and respond to potential threats. In many situations, it can actually be helpful, preparing the body to react quickly and stay safe.

However, for some people, anxiety can begin to feel overwhelming, persistent or difficult to control. People often describe feeling caught in a cycle of worry, physical tension and overthinking, unsure why their anxiety feels so intense or why it keeps returning.

As a Cognitive Behavioural Therapist, one of the most common things I hear from people is that they feel confused or frightened by their symptoms. They may wonder why their body reacts so strongly or why their thoughts seem to spiral so quickly when they feel anxious.

Understanding how anxiety works can often be an important first step in learning how to manage it more effectively. When people begin to recognise the patterns that maintain anxiety, they often feel less overwhelmed and more hopeful that change is possible.

The body’s threat system

Anxiety is closely linked to the body’s natural fight, flight or freeze response. This response evolved to protect us from danger by preparing the body to react quickly when a threat is detected.

When our brain senses potential danger, it activates the nervous system and releases stress hormones such as adrenaline. These changes prepare the body to respond quickly by increasing alertness and physical readiness.

As a result, people may experience physical sensations such as:

• a racing or pounding heart
• faster or shallower breathing
• muscle tension
• feeling restless or on edge
• increased alertness

These sensations can feel uncomfortable or even frightening, but they are not dangerous. They are simply signs that the body is preparing to respond to what it believes might be a threat.

In modern life, however, the situations that trigger this response are often very different from the physical dangers our bodies evolved to handle. Work stress, social situations, health worries or uncertainty about the future can all activate the same threat system.

For some people, this system can become highly sensitive, meaning it activates more easily or remains switched on for longer periods of time.

How thoughts can fuel anxiety

One of the central ideas within Cognitive Behavioural Therapy (CBT) is that our thoughts, emotions, behaviours and physical sensations are closely interconnected.

When physical symptoms of anxiety appear, it is common for people to interpret them in worrying ways. For example, a racing heart or feeling light-headed might lead to thoughts such as:

• “Something is wrong with me.”
• “I’m going to lose control.”
• “What if I can’t cope?”

These thoughts are completely understandable, particularly if the sensations feel intense or unfamiliar. However, interpreting these symptoms as dangerous can unintentionally increase anxiety.

When the brain believes there is a threat, it continues to activate the body’s alarm system. This can lead to a cycle where thoughts, physical sensations and emotions reinforce one another, making anxiety feel increasingly difficult to manage.

For example:

1. a physical sensation appears (such as a racing heart)
2. the sensation is interpreted as threatening
3. anxiety increases
4. the body’s threat system becomes more active

This process can happen very quickly and often outside of conscious awareness. As a result, many people feel as though anxiety appears suddenly or without explanation.

Avoidance and short-term relief

When anxiety becomes overwhelming, it is completely natural to want to avoid situations that trigger those feelings. Avoidance can provide immediate relief, which is why it can feel like a helpful strategy in the moment.

However, avoidance can sometimes unintentionally strengthen anxiety over time. When the brain avoids a feared situation, it never has the opportunity to learn that the situation may actually be safe or manageable. As a result, the threat response remains strong.

Over time, the number of situations that feel difficult may increase. Someone who initially avoids a single situation may find that their anxiety gradually spreads to other areas of life. For example, someone who begins avoiding certain social situations because of anxiety may find their confidence decreasing over time, making more situations feel challenging.

This does not mean that avoidance is a mistake or a weakness. It is often a very understandable response to feeling overwhelmed. However, it can unintentionally maintain the anxiety cycle.

The CBT model of anxiety

Cognitive Behavioural Therapy often explains anxiety using a model that looks at the interaction between four key areas:

• thoughts
• emotions
• behaviours
• physical sensations

Each of these areas influences the others. For example, anxious thoughts can trigger physical sensations, which then reinforce emotional distress and lead to avoidance behaviours.

By understanding how these areas interact, it becomes easier to identify the patterns that may be maintaining anxiety. This understanding can help people begin to respond differently to anxious thoughts and physical sensations, gradually weakening the cycle that keeps anxiety going.

How cognitive behavioural therapy can help

Cognitive Behavioural Therapy (CBT) is one of the most widely researched psychological therapies for anxiety and related difficulties. Rather than focusing only on discussing problems, CBT aims to help people develop practical skills that can be applied in everyday life.

In therapy, people may learn to:

• recognise patterns of thinking that increase anxiety
• develop more balanced ways of responding to difficult thoughts
• gradually face situations that have become difficult
• develop practical coping strategies for managing physical symptoms
• build confidence in their ability to handle challenging situations

CBT is often described as a skills-based therapy, meaning that the aim is not only to reduce anxiety in the short term but also to help people develop tools they can continue to use long after therapy has ended.

Many people find that learning about the anxiety cycle helps them feel less frightened by their symptoms and more able to respond to them in new ways.

Taking a first step

If anxiety has started to feel overwhelming, it can be helpful to remember that these experiences are extremely common and that effective support is available.

Learning more about how anxiety works can often reduce some of the fear surrounding the symptoms themselves. When people begin to understand the patterns that maintain anxiety, it becomes easier to start making changes.

For some people, this might involve learning practical self-help strategies. For others, therapy can provide a supportive and structured space to explore what may be contributing to anxiety and to begin developing new ways of responding.

Anxiety can feel overwhelming, but understanding how it works is often the first step towards change. With the right support and strategies, many people are able to learn new ways of responding to anxiety and feel more in control.