Anxiety & Anxiety Disorders
Explore how anxiety affects the brain and body, why worry and avoidance can persist, and what evidence-informed treatment can look like.
I want to understand anxietyWhat anxiety is, what it feels like, and common patterns.
Understanding Anxiety
Anxiety is the mind and body's response to possible danger or uncertainty. It can help us prepare, focus, and respond to challenges. Anxiety becomes a concern when fear or worry feels excessive, is hard to control, persists, or interferes with sleep, relationships, school, work, or everyday activities.
Having anxiety does not automatically mean you have an anxiety disorder. A clinician considers the pattern, duration, impact, medical factors, and other possible explanations before making a diagnosis.
Signs & Symptoms
Anxiety can affect thoughts, emotions, the body, and behavior. Experiences vary from person to person.
- Thoughts: excessive worry, expecting the worst, racing thoughts, difficulty concentrating, or repeated reassurance seeking.
- Emotions: dread, fear, irritability, feeling on edge, or difficulty relaxing.
- Physical sensations: muscle tension, rapid heartbeat, sweating, nausea, dizziness, trembling, headaches, or disrupted sleep.
- Behavior: avoiding situations, procrastinating, checking repeatedly, or withdrawing from activities.
Physical symptoms can also have medical causes. New, severe, or unexplained symptoms deserve appropriate medical evaluation.
Explore the body’s anxiety signals
Select a point on the body illustration or use the buttons to learn why anxiety may feel physical.
Anxiety can affect several body systems at once.
This is educational, not a symptom checker. New chest pain, fainting, or significant breathing difficulty needs prompt medical assessment.
Types of Anxiety Disorders
- Generalized anxiety disorder (GAD): persistent, difficult-to-control worry across multiple areas of life, often accompanied by tension, fatigue, restlessness, or sleep problems.
- Panic disorder: recurrent unexpected panic attacks along with ongoing concern about more attacks or changes in behavior to avoid them.
- Social anxiety disorder: significant fear of being judged, embarrassed, or negatively evaluated in social or performance situations.
- Specific phobias: intense fear of a particular object or situation, such as heights, flying, or needles.
- Agoraphobia: fear or avoidance of situations where escape or access to help might feel difficult.
- Separation anxiety disorder: excessive fear or distress about separation from important attachment figures; it can occur in children or adults.
OCD and PTSD can involve anxiety but are classified separately. They have their own pages in this guide.
I want to learn why it happensContributing factors and how the nervous system responds.
What Contributes to Anxiety?
Anxiety rarely has one single cause. Factors may include genetics and temperament, previous experiences, ongoing stress, sleep deprivation, medical conditions, substance use, certain medications, and changes in life circumstances.
Caffeine and other stimulants can worsen anxiety symptoms for some people. Thyroid conditions, heart rhythm problems, and other health issues can sometimes resemble anxiety, which is why a complete assessment matters.
Finding the Roots of Anxiety
Two people may feel equally anxious for very different reasons. For one person, anxiety may be a primary anxiety disorder. For another, it may be intensified by past trauma, untreated ADHD, autistic sensory overload, chronic stress, depression, sleep disruption, a medical condition, or several overlapping factors.
Conditions often coexist. Having ADHD does not rule out generalized anxiety disorder; trauma-related symptoms can overlap with panic; and OCD can look like ordinary worry while requiring a different treatment approach. A careful evaluation considers the full picture rather than assuming every symptom has the same cause.
Brain chemistry and inherited biology can influence anxiety, but the idea that every anxiety disorder results from one simple “chemical imbalance” is not supported by current evidence. Often there is no single root; identifying patterns, triggers, vulnerabilities, and maintaining factors is more useful.
Why this matters for treatment: If untreated ADHD is creating repeated overwhelm, addressing executive-function challenges may reduce some anxiety. If trauma is driving hypervigilance, trauma-focused care may be important. If panic is maintained by fear of bodily sensations, panic-focused CBT and exposure may be especially helpful. Coexisting conditions may need treatment together.
The anxiety iceberg: what we see vs. what may be underneath
Visible behavior is only part of the picture. Click a behavior to explore several possible underlying experiences—not assumptions about any one person.
Similar behaviors can have different explanations. Curiosity is more useful than assuming you know the cause.
This is a metaphor, not a diagnostic model. Some behaviors may arise from ADHD, stress, depression, sensory overload, or other causes rather than anxiety.
Different Anxiety Patterns, Explained with Analogies
These comparisons are designed to make anxiety easier to understand. They are not diagnostic tests, and more than one pattern can apply at the same time.
The nervous system may react strongly to reminders of previous danger, even when the present situation is safer.
Time blindness, forgotten tasks, deadlines, and repeated catch-up can fuel worry or dread.
Worry repeatedly moves from one possible future problem to another.
Intense physical alarm sensations can become frightening themselves, creating a fear-of-fear cycle.
Intrusive doubts and rituals may bring short relief but strengthen the cycle over time.
Sensory demands, unpredictability, masking, or unmet accommodations may contribute to anxiety.
Extended demands without enough recovery can increase tension, irritability, and overwhelm.
Sleep problems, thyroid disorders, medications, caffeine, and other factors can contribute to anxiety-like symptoms.
The goal is not to label yourself from an analogy. It is to recognize patterns you can discuss with a qualified clinician.
Why avoidance can keep anxiety going
Follow the four steps. Select each to see what happens—and where change becomes possible.
Avoidance can be protective in genuinely unsafe situations. Gradual exposure is intended for safe situations and may be best planned with a clinician.
The Brain & Nervous System
When the brain detects a possible threat, the body's alarm system can activate. Breathing may speed up, muscles tighten, and the heart may beat faster. This is often called the fight, flight, or freeze response.
The alarm system is useful during real danger, but with anxiety it may activate too often or too strongly. Learning to notice body signals, respond differently to anxious thoughts, and gradually face safe situations can help reduce the cycle over time.
Explore the anxiety alarm system
Select each stage to see a visual of the brain and body's response. These systems overlap; this is a simplified learning model, not a fixed biological sequence.
Brain networks, including the amygdala and prefrontal regions, work together with autonomic and hormonal stress systems. Anxiety is not caused by a single brain region.
Real danger or a false alarm?
The body can respond powerfully to both immediate threats and imagined or uncertain outcomes. The sensation alone cannot tell you whether a situation is safe.
Immediate danger
A vehicle is approaching while someone is crossing the road. A fast alarm can help them move to safety.
Possible future threat
Someone hasn't replied to a message. The mind predicts rejection, and the body may react before any facts are known.
I want to practiceCoping skills and everyday supports.
Coping & Lifestyle Support
- Slow your breathing: try a comfortable, gentle exhale that is slightly longer than your inhale. Stop if it makes you dizzy or uncomfortable.
- Ground yourself: name five things you can see, four you can feel, three you can hear, two you can smell, and one you can taste.
- Support your body: prioritize consistent sleep, regular meals, movement, and hydration.
- Notice patterns: track situations, thoughts, physical symptoms, and what helped.
- Reduce avoidance gradually: with appropriate support, practice manageable steps toward safe situations you have been avoiding.
- Review stimulants: notice whether caffeine, energy drinks, nicotine, or other substances intensify symptoms.
Worry or useful problem-solving?
Choose a familiar thought to see how you might move from rumination toward a manageable next step.
I want to explore treatment and supportTreatment options and when to reach out.
Treatment Options
Effective treatment depends on the type of anxiety, severity, personal preferences, medical history, goals, and any underlying or coexisting conditions. Understanding what drives and maintains symptoms helps guide the plan.
- Cognitive behavioral therapy (CBT): helps identify patterns of anxious thinking and behavior and practice more helpful responses.
- Exposure-based therapy: gradually and safely reduces avoidance and fear; it is especially helpful for phobias, panic, and social anxiety.
- Acceptance and commitment therapy (ACT): develops flexibility in responding to difficult thoughts and feelings while taking steps toward personal values.
- Medication: SSRIs and SNRIs are commonly used first-line medication options for several anxiety disorders. Selection, benefits, side effects, and timelines should be discussed with a prescriber.
- Other medications: some may be appropriate for particular symptoms or circumstances. Benzodiazepines have dependence, sedation, and other safety risks and are generally not preferred for long-term routine treatment.
Therapy, medication, or a combination may be helpful. Treatment is individualized, and improvement often takes practice and time.
CONTINUE LEARNINGUnderstand medication options →Visit the medication guide to prepare questions for your prescriber.When to Seek Professional Help
Consider speaking with a licensed healthcare professional when worry or fear is persistent, causes significant distress, affects daily functioning, leads to avoidance, or is difficult to manage on your own. A professional can assess symptoms and help create a personalized treatment plan.
Urgent support: If you or someone else is in immediate danger, call 911. In the U.S., call or text 988 for suicide or emotional crisis support. Seek emergency medical care for severe or new chest pain, fainting, or significant trouble breathing.
This page is for education only and does not replace individualized medical advice, diagnosis, or treatment.