Generalised Anxiety Disorder (GAD): Symptoms, Causes, Diagnosis and Treatment

Generalised Anxiety Disorder (GAD) is a common mental health disorder characterised by excessive, persistent and difficult-to-control worry about everyday situations. A person with GAD may worry about health, family, work, studies, finances, relationships or future events, even when there is little immediate reason for concern.

Worry is a normal part of life. People may feel anxious before an examination, during financial difficulties, when facing an illness or when dealing with an uncertain situation. However, in Generalised Anxiety Disorder, anxiety and worry become excessive and persistent and can interfere with daily life, sleep, work, studies and relationships.

What Is Generalised Anxiety Disorder?

The main feature of GAD is excessive and persistent worry about several areas of life.

A person may repeatedly think:

• "What if something goes wrong?"
• "What if my family member becomes ill?"
• "What if I lose my job?"
• "What if I make a mistake?"
• "What will happen to me in the future?"

The person may understand that the worry is excessive but still find it difficult to control or stop these thoughts.

GAD-related worries can also shift from one subject to another. A person may worry about health one day, finances the next, and then become concerned about work, family or another possible problem.

Symptoms of Generalised Anxiety Disorder

GAD symptoms can affect both mental and physical health. The severity and combination of symptoms can vary from person to person.

Psychological Symptoms of GAD

Common psychological symptoms of Generalised Anxiety Disorder include:

• Persistent or excessive worrying
• Difficulty controlling worry
• Restlessness
• Feeling constantly "on edge"
• Irritability
• Difficulty concentrating
• Excessive concern about future events
• Difficulty relaxing
• Repeatedly seeking reassurance
• Feeling unable to switch off anxious thoughts

Physical Symptoms of GAD

Anxiety can also cause physical symptoms. These may include:

• Muscle tension
• Headaches
• Trembling
• Excessive sweating
• Palpitations or a racing heartbeat
• Shortness of breath
• Stomach discomfort
• Fatigue
• Difficulty sleeping

Because anxiety can produce physical symptoms, some people initially consult a physician believing that they may have a physical illness. A medical evaluation can be appropriate, particularly when symptoms are new, severe or unexplained.

What Causes Generalised Anxiety Disorder?

There is no single cause of Generalised Anxiety Disorder. GAD causes are likely to involve an interaction between genetic, biological, psychological and environmental factors.

Some people may have an inherited tendency towards anxiety. Brain systems involved in detecting threats and regulating fear and stress may also contribute to the development of anxiety disorders.

Personality and temperament can play a role. People who are naturally cautious, highly sensitive to uncertainty or prone to excessive worry may be more vulnerable to persistent anxiety.

Long-term stress and difficult life circumstances may also contribute. These can include:

• Family problems
• Financial difficulties
• Work-related stress
• Academic pressure
• Relationship difficulties
• Major life changes
• Other prolonged stressful circumstances

However, GAD does not necessarily develop after a specific stressful event. In some people, it develops gradually without an obvious cause.

Understanding the Biology of Anxiety

Anxiety involves several interconnected areas and networks of the brain involved in threat detection, attention and emotional regulation. The amygdala, for example, plays an important role in processing potential threats and emotional responses.

The autonomic nervous system also contributes to the physical symptoms of anxiety. When the brain perceives danger, the body can activate the "fight-or-flight" response and release stress hormones.

In GAD, a person may become particularly sensitive to possible threats and uncertainty. The mind may repeatedly look for potential problems and imagine negative outcomes.

This process is not necessarily deliberate. Persistent worry can become automatic and difficult to control.

Generalised Anxiety Disorder and Sleep

GAD and sleep problems are closely connected. People with Generalised Anxiety Disorder may find it difficult to fall asleep because they continue thinking about problems, reviewing events from the day or imagining what might happen in the future.

Poor sleep can then contribute to tiredness, irritability and difficulty concentrating during the day. These effects may make anxiety feel worse.

This can create a cycle:

Worry → poor sleep → tiredness → increased anxiety → more worry

Addressing both anxiety and sleep difficulties can therefore be an important part of managing GAD.

How Does GAD Affect Daily Life?

Persistent anxiety can gradually affect several areas of a person's life.

A person with GAD may experience difficulty concentrating at work or school. Productivity may decline, and everyday tasks can feel more difficult.

Social activities may become less enjoyable. Relationships may also be affected when a person frequently seeks reassurance or repeatedly discusses possible problems.

Some people become excessively cautious or begin avoiding activities because they are worried that something might go wrong.

Over time, constant anxiety can become emotionally and physically exhausting.

Is GAD Just Excessive Worrying?

No. Generalised Anxiety Disorder is a recognised mental health disorder, rather than simply a personality weakness or a tendency to "think too much."

Ordinary worry is generally connected to a particular situation and may decrease when the situation is resolved.

In GAD, worry is typically:

• Excessive
• Persistent
• Difficult to control
• Related to several areas of life
• Associated with psychological or physical symptoms
• Significant enough to interfere with daily functioning

The distinction between normal worry and an anxiety disorder depends not only on how much a person worries, but also on the persistence, difficulty controlling the worry and its impact on everyday functioning.

Diagnosis of Generalised Anxiety Disorder

There is no blood test or brain scan that can independently diagnose GAD.

Diagnosis of Generalised Anxiety Disorder is made through a clinical assessment by a qualified healthcare or mental-health professional. The assessment generally considers the person's symptoms, their duration, severity and impact on everyday functioning.

A healthcare professional may also consider other possible medical or mental-health conditions that can cause similar symptoms.

People experiencing persistent or disruptive anxiety should seek an appropriate professional evaluation rather than attempting to diagnose themselves.

Treatment for Generalised Anxiety Disorder

GAD treatment can include psychological therapy, medication when clinically appropriate, lifestyle measures and other forms of professional support.

Psychological treatments can help people understand patterns of worry and develop healthier ways of responding to anxious thoughts. Medication may also be recommended for some people after assessment by a qualified healthcare professional.

Treatment should be individualised because symptoms, circumstances and treatment needs can differ between people.

A Message for Patients and Families

A person with Generalised Anxiety Disorder is not simply "thinking too much" or deliberately creating problems.

Persistent anxiety can be associated with changes in the way the brain and body respond to perceived threats, uncertainty and stress. Understanding the condition can help reduce fear and stigma.

With appropriate professional support, many people with GAD can learn to manage their symptoms and improve their quality of life.

Generalised Anxiety Disorder is common, real and treatable. Persistent anxiety should not be ignored simply because there is no obvious physical illness. Seeking professional help is a responsible step towards taking care of one's mental health, not a sign of weakness.