Anxiety Disorders Mental Health Conditions

7 Symptoms of Anxiety: Signs, Causes and When to Get Help

June 27, 20249 Mins read

7 Common Symptoms of Anxiety

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Symptoms of anxiety can affect thoughts, emotions, the body and behaviour. Seven common signs are excessive worry, restlessness, fatigue, difficulty concentrating, irritability, muscle tension and sleep problems. Having one or more of these symptoms does not automatically mean you have an anxiety disorder: clinicians also consider how long the pattern has lasted, how much distress or impairment it causes, and whether another health condition, medicine or substance could explain it.

Medical disclaimer: This article is for education only and is not a diagnosis or a substitute for care from a qualified health professional. Anxiety-like symptoms can also come from physical illnesses, medicines or substances. Seek urgent medical care for severe or new chest pain, fainting, marked breathing difficulty, sudden neurological symptoms, or any immediate danger. If you may harm yourself or cannot stay safe, contact your local emergency service or crisis line now.

Anxiety disorders are common and treatable. The World Health Organization (WHO) estimates that 359 million people—4.4% of the global population—had an anxiety disorder in 2021. Yet only about 27.6%, or roughly one in four, received treatment. Recognising a persistent pattern can be a useful first step toward appropriate support, but a symptom list is not a self-diagnostic test.

Normal anxiety vs. an anxiety disorder

Occasional anxiety is a normal response to uncertainty, pressure or danger. It may briefly increase alertness before an exam, medical appointment or difficult conversation. An anxiety disorder is different: fear or worry is intense, difficult to control, persistent and disruptive to work, study, relationships or everyday routines.

There are several anxiety disorders, and they do not all look the same. Generalised anxiety disorder (GAD) centres on persistent worry across many areas of life. Panic disorder involves recurrent panic attacks and concern about further attacks. Social anxiety disorder involves fear of scrutiny or rejection, while phobias involve intense fear and avoidance of particular objects or situations. Our guide to the different types of panic attacks explains one presentation in more detail.

The seven symptoms below closely match the common adult symptom cluster for GAD, although they can occur in other conditions and in everyday stress. Anxiety can also involve a pounding heart, sweating, trembling, dizziness, nausea, abdominal distress, shortness of breath, a sense of doom, reassurance-seeking or avoidance.

Common anxiety symptom	What it may feel or look like	Other possibilities to consider
Excessive worry	Repeated “what if?” thoughts that feel hard to control	Acute stress, depression, obsessive-compulsive symptoms
Restlessness	Feeling keyed up, on edge, unable to relax or sit still	Caffeine, stimulants, medication effects, thyroid problems
Fatigue	Low mental or physical energy, even after routine tasks	Sleep disorders, anaemia, infection, depression, other illness
Difficulty concentrating	Mind going blank, distractibility or indecision	Sleep loss, ADHD, depression, medication effects
Irritability	A shorter fuse or feeling more easily overwhelmed	Pain, sleep deprivation, mood disorders, substance effects
Muscle tension	Tight jaw, shoulders or back; tension headaches or aches	Posture, injury, pain conditions, medication effects
Sleep disturbance	Trouble falling asleep, staying asleep or feeling restored	Insomnia, sleep apnoea, substances, medical conditions

1. Excessive or hard-to-control worry

Worry becomes more concerning when it is frequent, difficult to stop and out of proportion to the situation. A person may repeatedly anticipate problems involving health, money, work, school, family or ordinary responsibilities. The mind may keep scanning for certainty even after sensible precautions have been taken.

This pattern can lead to repeated checking, reassurance-seeking, procrastination or avoidance. It may also make ordinary choices feel unusually risky; see how anxiety can affect decision-making and what can help.

2. Restlessness or feeling “on edge”

Restlessness may feel like an internal motor that will not switch off. You might fidget, pace, struggle to sit through a meeting or feel constantly braced for something to go wrong. Children may show this as clinginess, repeated questions or difficulty settling rather than describing themselves as anxious.

Restlessness is not specific to anxiety. Caffeine, nicotine, decongestants, prescribed stimulants, medication changes, substance withdrawal and some physical conditions can produce a similar feeling. New or intense symptoms deserve a medical review rather than an assumption that anxiety is the cause.

3. Fatigue

Persistent vigilance and worry can be exhausting. Anxiety may drain attention during the day and interfere with restorative sleep at night. Some people feel tired after periods of high arousal; others notice that routine tasks require more effort because so much mental energy is directed toward monitoring threats.

Fatigue has many possible causes, including anaemia, thyroid disease, sleep apnoea, infection, chronic pain, medication effects and depression. If tiredness is new, severe, persistent or accompanied by other physical changes, discuss it with a health professional.

4. Difficulty concentrating

Anxious thoughts compete for limited attention. You may reread the same sentence, lose track of a conversation, forget small details or feel that your mind has gone blank. Indecision can follow because the brain gives extra weight to possible negative outcomes.

This does not mean anxiety causes permanent cognitive damage. Concentration often improves when sleep and anxiety improve. Because attention problems can also occur with ADHD, depression, sleep disorders and physical illness, context and a full assessment matter.

5. Irritability

Irritability—not aggression—is a recognised anxiety symptom. When someone feels tense, sleep-deprived or overloaded, ordinary noise, delays or questions may feel harder to tolerate. They may become impatient, withdraw or respond more sharply than intended.

Irritability alone does not identify an anxiety disorder. It can accompany pain, depression, trauma-related conditions, bipolar disorder, hormonal changes, substance use and many other experiences. A clinician looks at the whole pattern rather than one behaviour.

6. Muscle tension and aches

Anxiety can keep the body prepared for action. People may unknowingly clench the jaw, raise the shoulders or tighten muscles in the neck, scalp, back and abdomen. Over time, this can contribute to tension headaches, stiffness or soreness. The tension is related to sustained arousal and muscle contraction—not to sweating.

Gentle movement, paced breathing and progressive muscle relaxation may ease short-term tension. Our overview of grounding techniques offers additional ways to redirect attention during a surge of anxiety. Persistent or severe pain still needs appropriate medical assessment.

7. Sleep disturbance

Anxiety may make it difficult to fall asleep, lead to repeated waking or leave sleep feeling unrefreshing. Worry can become louder when the day is quiet, while physical tension keeps the body alert. The relationship can work in both directions: poor sleep may also increase emotional reactivity and make anxiety harder to manage the next day.

A regular sleep-wake schedule, less late-day caffeine and a wind-down routine may help, but persistent insomnia deserves its own assessment. Be cautious if detailed sleep scores increase worry; our evidence-based review asks whether sleep trackers can improve sleep and explains their limits.

What causes anxiety disorders?

There is no single cause and no simple test for a “chemical imbalance.” Current evidence supports a biopsychosocial model: biological vulnerability, learning and thinking patterns, life experiences, physical health and social conditions can interact differently for each person. A trigger may explain why symptoms intensified now, while longer-term risk factors help explain vulnerability.

Genetics and family history: anxiety disorders can run in families, but genes are not destiny. Shared experiences and learned coping patterns also matter.
Temperament and learning: behavioural inhibition, high threat sensitivity, intolerance of uncertainty and avoidance can increase vulnerability or maintain anxiety. Avoidance brings short-term relief, which can unintentionally teach the brain that the avoided situation remains dangerous.
Stressful or adverse experiences: abuse, severe loss, trauma, illness, caregiving pressure, workplace strain, financial insecurity and other prolonged stressors can contribute. These experiences do not affect everyone in the same way.
Physical health: thyroid disease, heart-rhythm problems and other conditions can cause or amplify anxiety-like symptoms. Living with chronic illness can also increase anxiety.
Medicines and substances: caffeine, nicotine, stimulants, some decongestants and other medicines may worsen symptoms. Alcohol or sedatives may feel calming briefly but can worsen sleep, create rebound anxiety or lead to dependence.
Sleep and coping cycles: worry disrupts sleep, poor sleep reduces coping capacity, and the resulting fatigue can increase worry. Similar feedback loops can form around reassurance, avoidance and substance use.

If ongoing pressures are part of the picture, this guide to stress management and health can help you identify practical supports without treating stress reduction as a cure-all.

How anxiety disorders are diagnosed

A health professional asks about the type, frequency, duration and impact of symptoms; medical history; medicines; caffeine, alcohol and other substance use; sleep; and other mental health symptoms. A physical examination or tests may be appropriate when a medical cause is possible.

For adult GAD, the National Institute of Mental Health summarises the diagnostic pattern as difficult-to-control worry on most days for at least six months, together with at least three of these: restlessness or feeling on edge, fatigue, concentration difficulty, irritability, muscle tension or sleep problems. Clinicians also assess distress, impairment and alternative explanations. Other anxiety disorders have different criteria, so seven symptoms are not a universal checklist.

Evidence-based treatment and support

Treatment should be matched to the anxiety disorder, severity, preferences, medical situation and access. It may include psychotherapy, medication or both.

Cognitive behavioural therapy (CBT): CBT and disorder-specific exposure methods have the strongest evidence across anxiety disorders. A 2024 JAMA Psychiatry network meta-analysis of 65 randomised trials involving 5,048 adults with GAD found that CBT, third-wave CBTs and relaxation therapy reduced symptoms more than treatment as usual; after higher-risk studies were excluded, CBT and third-wave approaches remained superior, and only CBT showed a significant advantage at three to 12 months.
Delivery format matters: A 2025 network meta-analysis of 52 trials and 4,361 people with GAD found that individual CBT outperformed remote CBT in the network comparison and that group CBT outperformed a waiting list; treatment acceptability did not significantly differ by format. This does not mean teletherapy cannot help—programme quality, therapist involvement, the specific disorder and individual fit matter. Learn more in our guide to CBT for anxiety.
Medication: clinicians may use antidepressants such as SSRIs or SNRIs for some anxiety disorders. Benefits take time and side effects vary. WHO generally does not recommend benzodiazepines for routine anxiety-disorder care because of dependence potential and limited long-term effectiveness; they may be used briefly in selected cases under medical supervision. Do not start, stop or change medication without the prescriber.
Supportive habits: regular movement, consistent sleep and meals, reducing caffeine and alcohol, relaxation and mindfulness may support treatment. They are not a replacement for needed clinical care. You can try these mindfulness exercises for anxiety as optional coping practices.

If symptoms persist, a primary-care professional or qualified mental health professional can help with the next step. These signs it may be time to see a therapist and this explanation of psychotherapy and counselling may make the options easier to understand.

How to evaluate online therapy, apps and anxiety tools

Digital tools can improve access, but “wellness” branding is not evidence. Before paying for an app, online programme or therapy platform, check:

whether therapists are licensed for your location and credentials can be verified;
whether the programme names the intervention it uses and cites relevant peer-reviewed evidence;
how personal and health data are collected, stored, shared or used to train AI;
the full cost, cancellation policy, therapist availability and crisis limitations; and
whether claims promise a cure, instant diagnosis or guaranteed result—important warning signs.

Advertising and collaboration disclosure: No product or provider named in this editorial guide is a paid endorsement at the time of this update. Display advertising may appear separately. Any future sponsored or affiliate placement should be clearly labelled, remain separate from medical claims, and meet standards for licensure, evidence, privacy, transparent pricing and crisis safeguards.

Appropriate commercial partners for this topic could include licensed teletherapy providers, evidence-based digital CBT programmes, employee-assistance or mental-health navigation services, and privacy-conscious journaling or relaxation tools. Supplements, unvalidated diagnostic quizzes, “miracle cure” products and ads placed beside crisis guidance would not be appropriate.

When to seek help

Consider professional support when anxiety is persistent, difficult to control, causing significant distress, disrupting sleep or daily functioning, leading to avoidance, or being managed with alcohol or other substances. Seek medical assessment for new physical symptoms or when you are unsure whether anxiety is the cause.

Get urgent help for severe chest pain, fainting, marked breathing difficulty, sudden confusion or weakness, or another possible medical emergency. If you are thinking about suicide, may hurt yourself or someone else, or cannot stay safe, contact your local emergency service or crisis line immediately and, if possible, stay with a trusted person.

Frequently asked questions

Are these seven anxiety symptoms enough for a diagnosis?

No. They are common signs, especially in GAD, but diagnosis depends on duration, severity, impairment, the overall symptom pattern and ruling out other causes. Different anxiety disorders have different criteria.

Can anxiety cause physical symptoms?

Yes. Anxiety can involve muscle tension, a rapid heartbeat, sweating, trembling, nausea, dizziness and shortness of breath. Because physical illness can cause similar symptoms, new, severe or unexplained symptoms should not be self-diagnosed.

Can caffeine make anxiety worse?

It can. Caffeine may increase alertness, restlessness, tremor, palpitations and sleep difficulty, especially at higher doses or in sensitive people. Cutting down gradually may be more comfortable than stopping suddenly.

How long must anxiety last to be GAD?

For adults, GAD involves difficult-to-control worry on most days for at least six months, plus associated symptoms and meaningful distress or impairment. A clinician must assess the full criteria and alternative explanations.

What treatment has the strongest evidence?

CBT—including disorder-specific exposure methods—has the strongest evidence across anxiety disorders. Medication, including SSRIs or SNRIs, may also help some people. The right option depends on the diagnosis, preferences, risks and medical history.

Is online therapy effective for anxiety?

It can be, particularly when a qualified clinician delivers a structured, evidence-based treatment. Results vary by programme and person. Verify licensure, therapist involvement, privacy, cost and crisis procedures rather than assuming every app or platform is equivalent to therapy.

Can lifestyle changes cure an anxiety disorder?

Healthy sleep, exercise, reduced substance use, relaxation and mindfulness may reduce symptoms and support treatment, but they are not guaranteed cures and should not replace necessary professional care.

Key takeaways

Common anxiety symptoms include excessive worry, restlessness, fatigue, poor concentration, irritability, muscle tension and sleep disturbance.
A symptom list cannot diagnose an anxiety disorder; persistence, distress, impairment and alternative causes all matter.
Anxiety disorders arise from interacting biological, psychological, social and health factors—not a single “chemical imbalance.”
CBT has strong evidence, while medication and supportive habits may be useful depending on individual needs.
Seek professional help when anxiety persists or disrupts life, and urgent help for a possible medical emergency or immediate safety risk.