Common causes and risk factors of anxiety
If you have ever wondered why anxiety seems to run in families, or why a particular situation sets it off while other people seem fine, you are asking a sensible question. The causes are rarely one thing, and understanding the mix can help you make sense of your own experience.
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Anxiety rarely has a single cause
Most people who struggle with anxiety want to know why. The short answer is that it is usually a combination of things: your biology, your personal history, and the world you live in. None of these on their own guarantee you will develop anxiety, but together they can tip the balance.
Think of it like a cup. Everyone has a cup that fills up with stress, worry, and difficult feelings. Some people are born with a smaller cup. Others have a cup that gets filled by circumstances. When the cup overflows, you feel anxious. The factors below are what make the cup smaller or fill it faster.
Genetic factors: what you inherit
Anxiety can run in families, but that does not mean there is a single "anxiety gene". What you inherit is more of a tendency: a nervous system that is quicker to react to threat, or a temperament that is more cautious and sensitive.
If one of your parents has struggled with anxiety, your own risk is higher. This is partly genetic and partly about growing up around someone who is often worried. You may have learned to scan for danger because that is what your family did.
It is important to know that inheritance is not destiny. Many people with a family history of anxiety never develop it themselves, and many people with no family history do. Genetics loads the gun, but environment pulls the trigger.
Psychological factors: how your mind learned to react
Your personal history shapes how your brain learns to respond to the world. Some of the most common psychological risk factors include:
- Temperament. Some children are born more inhibited, shy, or sensitive. They tend to avoid new situations and react strongly to change. This trait, sometimes called behavioural inhibition, is one of the strongest early predictors of later anxiety.
- Early experiences. If you grew up with a parent who was unpredictable, critical, or anxious themselves, you may have learned that the world is not safe. Trauma, neglect, or even just a lack of emotional warmth can teach your brain to stay on high alert.
- Thinking patterns. Certain ways of thinking make anxiety more likely. Catastrophising (imagining the worst-case scenario), overgeneralising (one bad experience means everything is bad), and perfectionism (nothing is ever good enough) all keep the anxious mind running in circles.
- Control and predictability. If you grew up feeling you had little control over what happened to you, you may try to control everything now. Anxiety often comes from the feeling that something bad might happen and you will not be able to handle it.
These patterns are not permanent. Therapy, especially approaches like CBT for anxiety: what it is and how it works, can help you recognise and change them.
Environmental factors: what life throws at you
Even if you have no family history of anxiety and a resilient temperament, life events can still bring it on. Common environmental triggers include:
- Major life changes. Moving house, changing jobs, ending a relationship, becoming a parent, or losing someone close. Even positive changes like a promotion or a wedding can be stressful because they disrupt your routine.
- Chronic stress. Long-term money worries, caring for a sick relative, working in a high-pressure job, or living in an unsafe area. This kind of stress wears down your resources over months and years.
- Trauma and adversity. A single traumatic event, such as an accident, assault, or natural disaster, can trigger anxiety that lasts long after the event itself. So can ongoing adversity like bullying, discrimination, or domestic abuse.
- Physical health problems. Chronic pain, a serious diagnosis, or a condition that affects your hormones or nervous system can all contribute to anxiety. Sometimes the physical problem comes first, and the anxiety is a response to living with it.
- Substances. Caffeine, alcohol, and some recreational drugs can trigger or worsen anxiety. Withdrawal from alcohol or benzodiazepines can also cause severe anxiety.
How it shows up in different lives
A midwife in Kampala named Amina noticed her anxiety got worse after each shift in a busy maternity ward. She had no family history of it, but the cumulative stress of long hours, understaffing, and witnessing complications started to wear her down. For her, the cause was mostly environmental, but it took her months to see it that way.
A shopkeeper in Lagos named Chidi had always been a worrier, even as a child. His father had been the same. For Chidi, the genetic and temperament factors were there from the start, but running a small business with unpredictable income made everything worse. The environment filled a cup that was already small.
When does it become a problem?
Anxiety is a normal human emotion. It becomes a problem when it is:
- Persistent. It does not go away when the stressful situation ends.
- Disproportionate. Your reaction is much bigger than the actual threat.
- Interfering. It stops you from doing things you want or need to do.
If you recognise these signs, it may be worth looking into whether you have a specific condition, such as generalised anxiety disorder (GAD): when worry never stops, social anxiety: more than shyness, or a specific phobia: when a fear takes over.
What you can do about it
Understanding the causes does not mean you are stuck with them. Here are some practical things to try:
- Look at your patterns. Keep a simple log for a week. When does anxiety spike? What was happening just before? You may start to see triggers you had not noticed.
- Reduce the load. If your cup is overflowing, see if you can take anything off. That might mean saying no to something, delegating, or dropping a commitment that is not essential.
- Change what you can. If caffeine makes things worse, cut back. If lack of sleep is a factor, prioritise rest. Small changes add up.
- Talk to someone. This can be a trusted friend, a community leader, or a professional. Therapy O'Clock connects you with independent therapists who can help you understand your own mix of causes and work with them. You can also talk to your GP or family doctor, or check local mental health services.
- Look after your body. Anxiety is not all in your head. Exercise, regular meals, and enough sleep all affect how your nervous system functions.
Getting professional help
If anxiety is affecting your daily life, it is worth seeing a professional. A therapist can help you untangle the causes that apply to you and find ways to manage them. You can search for a therapist who fits your needs in the professionals directory.
For more background on what anxiety is and when to seek help, see What is anxiety? Signs, causes and when to get help.
If you are unsure where to start, the NHS mental health (UK) and Beyond Blue (Australia) have good information on finding support.
Questions people ask
Can stress at work cause anxiety even if I have never had it before?
Yes. Chronic work stress is a common environmental trigger. Even without a family history or a vulnerable temperament, long-term pressure, poor boundaries, and lack of support can push anyone into anxiety.
Is anxiety caused by a chemical imbalance in the brain?
That is an oversimplification. Anxiety involves many brain regions and neurotransmitters, but it is not simply a matter of too much or too little of one chemical. The brain's alarm system becomes overactive, and that has genetic, psychological, and environmental roots.
Can a traumatic event years ago still cause anxiety now?
Yes. Trauma can change how your nervous system responds to threat, and those changes can last for years. You may not think about the event often, but your body can still react as if it is happening.
Does caffeine really cause anxiety?
Caffeine can trigger or worsen anxiety symptoms in some people. It stimulates the nervous system, which can mimic the physical sensations of anxiety, like a racing heart. If you are prone to anxiety, cutting back can help.
Are women more likely to have anxiety than men?
In many places, women are diagnosed with anxiety disorders more often than men. This may be partly biological, but it is also about social factors: women are more likely to seek help, and they face different pressures and expectations.
Can children develop anxiety from their parents?
Yes, in two ways. They can inherit a genetic tendency, and they can learn anxious patterns by watching a worried parent. Both can be addressed with support.
Is it possible to have anxiety without a clear reason?
Yes. Anxiety does not always have an obvious trigger. It can come from a combination of small factors that build up, or from a biological tendency that is just part of who you are. That does not make it less real.
Does social media cause anxiety?
Social media can contribute, especially if you compare yourself to others, feel pressure to respond quickly, or get into arguments online. It is not usually the sole cause, but it can be a significant environmental factor.
Can a physical illness cause anxiety?
Yes. Chronic pain, heart conditions, thyroid problems, and hormonal changes can all produce or worsen anxiety. Sometimes the physical illness comes first, and anxiety is a natural response to living with it.
If my parent had anxiety, will I definitely get it too?
No. A family history raises your risk, but it does not guarantee anything. Many people with anxious parents never develop an anxiety disorder themselves.
Can anxiety go away on its own?
It can lessen when the stressful situation ends, but the underlying pattern may remain. Without addressing the causes, it often comes back when another trigger appears. That is why understanding your own risk factors is useful.
Is there a difference between being anxious and having an anxiety disorder?
Yes. Everyone feels anxious sometimes. An anxiety disorder is when the anxiety is persistent, disproportionate, and interferes with your life. The causes and risk factors are the same, but the impact is more severe.