How to know if you have anxiety

Anxiety is the most common mental health condition on the planet. The WHO estimates that 301 million people worldwide had an anxiety disorder as of 2019. And that was before the pandemic made everything worse.

But "anxiety" has become one of those words that means everything and nothing. People use it to describe the nerves before a job interview, the dread of a difficult conversation, and the paralysing inability to leave the house. These are not the same thing. The first is normal. The last is a disorder. The question most people are really asking is: where does normal worry end and clinical anxiety begin?

Normal anxiety is functional

Anxiety is supposed to exist. It's your brain's threat detection system. When it works correctly, it makes you study for exams, look both ways before crossing the road, and prepare for important meetings. The feeling is uncomfortable on purpose. That discomfort motivates action.

Normal anxiety has a few consistent features:

• It's proportional to the situation. A big presentation makes you nervous. A text message doesn't.
• It's time-limited. The anxiety peaks around the event and fades afterward.
• It's manageable. You feel it, but you can still function. You give the presentation. You have the conversation. The anxiety doesn't stop you.
• It responds to reassurance. When you get information that the threat isn't real, the anxiety reduces.

If your anxiety fits this description, you probably don't have an anxiety disorder. You have a working nervous system.

Clinical anxiety is disproportionate and persistent

An anxiety disorder is what happens when the threat detection system misfires. It triggers too easily, too intensely, and doesn't shut off when the threat is gone. The alarm keeps ringing after the fire's been put out.

The GAD-7 (Generalised Anxiety Disorder 7-item scale), developed by Spitzer, Kroenke, Williams, and Lowe in 2006, is one of the most validated screening tools for clinical anxiety. It asks about seven symptoms over the past two weeks:

• Feeling nervous, anxious, or on edge
• Not being able to stop or control worrying
• Worrying too much about different things
• Trouble relaxing
• Being so restless that it's hard to sit still
• Becoming easily annoyed or irritable
• Feeling afraid, as if something awful might happen

Each item is rated from 0 (not at all) to 3 (nearly every day). A total score of 10 or above suggests moderate anxiety that warrants clinical attention. The cut-off isn't arbitrary. It was validated against structured clinical interviews and correctly identifies generalised anxiety disorder with a sensitivity of 89% and specificity of 82%.

But here's what the score alone doesn't tell you: context.

The line isn't just about symptoms. It's about impairment.

You can have anxiety symptoms without having a disorder. The dividing line, clinically, is functional impairment. Are the symptoms preventing you from doing things you need to do or want to do?

Some examples of what impairment looks like:

• Avoiding social situations you used to handle comfortably
• Spending hours on a task that should take minutes because you're paralysed by the fear of getting it wrong
• Cancelling plans repeatedly because the thought of going out feels overwhelming
• Physical symptoms (racing heart, nausea, shallow breathing) that show up in situations that aren't actually dangerous
• Sleep that's consistently disrupted by racing thoughts about things that might go wrong
• Difficulty making decisions because every option feels like it could lead to catastrophe

If you recognise yourself in three or four of those, and they've been present most days for at least several weeks, that's worth taking seriously.

The types get confused

"Anxiety" is an umbrella term. Under it sit several distinct conditions, each with different patterns:

Generalised anxiety disorder (GAD) is chronic, free-floating worry about multiple things. The worry jumps between topics: health, money, work, relationships. It doesn't need a trigger. It manufactures its own. People with GAD often describe their mind as a "what-if machine" that won't stop running worst-case scenarios.

Social anxiety disorder is intense fear of being judged, embarrassed, or humiliated in social situations. It's not shyness. Shy people feel uncomfortable but can push through. Social anxiety can make people restructure their entire life to avoid situations where they might be observed or evaluated. Turning down promotions. Eating lunch alone. Never speaking in meetings.

Panic disorder is recurrent panic attacks, sudden surges of intense fear that peak within minutes and produce physical symptoms so severe that many people believe they're having a heart attack. The hallmark of panic disorder isn't the attacks themselves (lots of people have one or two in their life). It's the persistent fear of having another one, which leads to avoidance of situations associated with past attacks.

Specific phobias are intense, irrational fears of specific objects or situations (heights, spiders, flying, needles). The fear is disproportionate and the person usually knows it's irrational, but that knowledge doesn't reduce the fear.

These can overlap. Someone with GAD might also have social anxiety. Someone with panic disorder might develop agoraphobia (fear of situations where escape feels difficult). The boundaries between categories are fuzzy in real people, even if they're crisp in textbooks.

What anxiety gets confused with

Several conditions mimic anxiety or coexist with it, which complicates the picture:

ADHD. The inability to focus, the sense of being overwhelmed, the restlessness. These overlap significantly with anxiety. In some cases, what presents as anxiety is actually ADHD-driven overwhelm: when your executive function can't prioritise, everything feels urgent, and the resulting flood produces anxiety symptoms. Studies suggest 25-50% of adults with ADHD also meet criteria for an anxiety disorder.

Thyroid dysfunction. An overactive thyroid (hyperthyroidism) produces anxiety symptoms almost indistinguishable from GAD: rapid heartbeat, restlessness, difficulty sleeping, irritability. Any good anxiety evaluation should include a thyroid panel.

Caffeine. This sounds trivial but it's not. Caffeine is an adenosine receptor antagonist that increases cortisol and adrenaline. In people predisposed to anxiety, even moderate caffeine intake (2-3 cups of coffee) can push them over the symptom threshold. Some people have reduced their GAD-7 score by half just by cutting caffeine. It's worth trying before assuming you need medication.

Trauma. Hypervigilance, startle responses, and avoidance behaviours from PTSD look a lot like anxiety. The difference is that trauma-related anxiety is tied to specific cues that echo the traumatic event, while GAD is diffuse and untethered to any particular memory.

What to do if you think you have it

Step one is acknowledgement, not diagnosis. If anxiety is interfering with your daily life, that's enough reason to seek help. You don't need to meet the full criteria for a disorder before you're "allowed" to talk to someone about it.

Step two is screening. A validated tool like the GAD-7 gives you a baseline and gives a clinician something concrete to work with. "I scored 14 on the GAD-7" is more useful in a clinical conversation than "I've been feeling anxious."

Step three is professional evaluation. A good clinician will assess not just the anxiety but the context around it. When did it start? Is there a trigger? Are there other conditions present (depression, ADHD, trauma)? Is there a medical explanation? The goal isn't to label you. It's to figure out what's actually going on so the treatment matches the problem.

Anxiety lies to you. It tells you the worst-case scenario is the likely scenario. It tells you that asking for help is weak, that your problems aren't bad enough, that other people manage just fine. None of that is true. Anxiety disorders respond well to treatment. Most people improve significantly. But only if they start.