Anxiety: Causes, Assessment & Nursing Guide
⚡ At-a-Glance Nursing Summary
- Vital signs and trends: HR, BP, RR, SpO₂, temperature, pain score
- Safety screen per protocol: self-harm, harm to others, inability to care for basic needs, severe agitation
- Pattern and triggers: sudden vs gradual, exertion, rest, substance timing, medication changes
- Associated somatic complaints: chest discomfort, dyspnea, neurologic symptoms, palpitations
- Baseline mental health context when known: prior anxiety disorders, trauma history, perinatal period
- Chest pain with hemodynamic instability, diaphoresis, or radiation—treat as urgent until evaluated
- Severe dyspnea, hypoxia, or cyanosis—prioritize airway and breathing
- Syncope, focal neurologic deficit, or sudden severe headache
- Suicidal ideation with intent or plan, or command hallucinations to harm self or others
- Delirium features: fluctuating attention with new anxiety—search for medical causes
- Vital sign instability or rising early warning score despite basic measures
- Escalating chest pain, syncope, or new arrhythmia pattern
- Positive safety screen or inability to contract for safety
- Severe agitation with risk to staff or other patients
- Pregnancy with severe dyspnea, chest pain, or hemodynamic compromise—obstetric and emergency pathways
- Withdrawal risk (alcohol or sedatives) with autonomic storm or seizure concern
Depending on setting, anxiety may arrive as a whisper or an alarm. Either way, safety improves when you document what you see, what you measured, and what changed after interventions—not interpretive shorthand.
The differential and population notes below support that discipline.
What Is Anxiety?
Anxiety is a sense of apprehension, worry, or unease that may be accompanied by autonomic arousal, muscle tension, vigilance, or avoidance. Patients often describe feeling “on edge,” keyed up, or unable to stop thinking about what might go wrong.
As a nursing observation, anxiety can be subjective (reported distress) and objective (restlessness, tremor, tachycardia). The same presentation may be associated with primary anxiety conditions, mood disorders such as depression, substance-related states, medical illness, medication effects, or situational stress—it is not a stand-alone diagnosis from a single finding.
Anxiety is a symptom and a human stress response. Your job is to document pattern, severity, safety, and associated findings—then support timely evaluation—without turning bedside language into a psychiatric label.
Common Causes of Anxiety
The list below groups common patterns where worry and arousal appear. Overlap is expected; licensed clinicians determine diagnoses and plans.
Related symptoms often assessed alongside this topic include Altered Mental Status, Confusion, and Emotional Lability.
- Primary anxiety presentations: May be associated with generalized worry, situational fear, or recurrent surges of symptoms that may be associated with conditions such as anxiety disorders or panic disorder when criteria are met—diagnosis requires evaluation.
- Mood disorders: Anxiety frequently co-occurs with depressive symptoms; some patients emphasize worry more than low mood.
- Medical mimics and contributors: Arrhythmia, hypoxia, pulmonary embolism, anemia, thyroid disease, pheochromocytoma (rare), and pain can present with prominent autonomic symptoms mistaken for “only anxiety.”
- Substance-related states: Stimulants, caffeine excess, alcohol withdrawal, and benzodiazepine withdrawal may increase arousal and distress.
- Medications: Some bronchodilators, corticosteroids, and other agents may increase sympathetic tone or restlessness in susceptible patients.
- Situational stressors: Bereavement, financial strain, trauma reminders, bullying, and occupational burnout can produce persistent anxiety symptoms without a single medical cause.
How This Typically Presents in Clinical Settings
ED / Urgent care
- Episodes of palpitations, chest tightness, or dyspnea prompting rule-out for acute coronary syndrome, pulmonary embolism, or arrhythmia
- Hyperventilation with perioral tingling, lightheadedness, and carpopedal spasm—overlap with metabolic and cardiopulmonary differentials
- Co-presenting substance withdrawal, intoxication, or trauma-related distress after safety is addressed
General ward / Medical–surgical
- Pre-procedural worry, sleep loss, and autonomic arousal around lines, imaging, or surgery
- Patients with chronic illness who catastrophize symptoms; also watch for undertreated pain or infection driving distress
ICU and step-down
- Anxiety amplified by noise, sleep deprivation, immobility, and inability to predict the next intervention
- Weaning, extubation, and delirium risk—anxiety may coexist with or mask fluctuating attention
Outpatient / Primary care / Perinatal clinics
- Chronic worry with somatic complaints (GI upset, tension headaches) and functional impact on work or relationships
- Perinatal patients with intrusive worry, hypervigilance about fetal wellbeing, or panic-like symptoms—coordinate obstetric and mental health pathways when indicated
Common Signs and Symptoms Nurses Observe
- Verbalized worry, rumination, or fear of losing control; difficulty concentrating
- Restlessness, foot tapping, pacing, or inability to sit still
- Tachycardia, palpitations, or visibly bounding pulse when assessed
- Hyperventilation, sighing breathing, or complaint of air hunger
- Diaphoresis, tremor, dry mouth, nausea, or abdominal discomfort
- Difficulty falling or staying asleep; early morning awakening in some patterns
- Muscle tension in neck, jaw, or shoulders; headache complaints
- Avoidance behaviors: refusing procedures, leaving waiting areas, or seeking repeated reassurance
Nursing Interpretation
Link observations to context and risk—avoid diagnostic certainty at the bedside.
| Finding | Clinical Interpretation (Non-diagnostic) |
|---|---|
| Worry tied to identifiable stressor; vitals stable; exam non-focal | May reflect situational anxiety or adjustment; still document trajectory and function |
| Recurrent surges of fear with palpitations, dyspnea, tremor, peaking within minutes | May be associated with panic symptoms; must still exclude cardiopulmonary emergencies when features overlap |
| Anxiety with persistent insomnia, low mood, anhedonia, or guilt | May overlap mood and anxiety presentations—support structured assessment and follow-up per protocol |
| Anxiety with fever, productive cough, hypoxia, or pleuritic pain | Raises concern for respiratory infection or other pulmonary pathology—escalate medical evaluation |
| New anxiety with tremor, heat intolerance, weight loss, or atrial fibrillation | May be associated with endocrine or cardiovascular conditions—requires medical workup, not reassurance alone |
| Fluctuating attention, disorganized thinking, or waxing-waning course | Prioritize delirium considerations; anxiety may be present but should not distract from organic illness |
Early Warning Signs
- Progressive avoidance: missed appointments, refusal of previously tolerated care steps
- Sleep erosion before major spikes in reported worry—fatigue amplifies arousal
- Repeated calls for reassurance with no change in objective status—may signal escalating distress
- Somatic amplification: new non-localized chest or abdominal complaints without prior pattern
- Subtle autonomic shifts: resting HR trending up across shifts while activity level is unchanged
In older adults, “anxiety” may be the patient’s word for dyspnea, pain, or delirium. Brief cognitive screening and infection/metabolic review belong in the same conversation as supportive language.
Crisis-level versus routine presentations
| Presentation pattern | Likely considerations (examples) | Priority |
|---|---|---|
| Chest pain + diaphoresis + instability | Acute coronary syndrome, PE, aortic catastrophe—among others | Emergency—activate urgent medical pathways |
| Panic-like surge with vitals stabilizing, prior similar episodes, non-focal exam | May be associated with panic symptoms after dangerous causes addressed per protocol | Urgent—document, observe, follow disposition plan |
| Chronic worry with preserved vitals and intact safety screen | May be associated with generalized anxiety patterns; outpatient or stepped care follow-up | Routine—support, educate, arrange follow-up |
| Anxiety + fever, infection signs, or new oxygen requirement | Medical illness driving distress | Urgent—medical evaluation and targeted treatment |
Patient Population Differences
Children and adolescents
- May present with stomachaches, irritability, school refusal, or sleep disruption rather than the word “anxiety.”
- Use developmentally appropriate questions; involve caregivers when appropriate and follow safeguarding pathways if risk emerges.
Older adults
- May under-report worry while showing agitation, falls, refusal to eat, or somatic fixation.
- Delirium, infection, medication anticholinergic burden, and occult MI remain high on the differential.
Pregnancy and postpartum
- Physiologic palpitations and dyspnea occur; new severe symptoms, hemodynamic changes, or preeclampsia features require obstetric escalation.
- Perinatal anxiety and mood symptoms can overlap—coordinate perinatal mental health resources when available.
Chronic illness and pain
- Anxiety may track disease uncertainty, procedural burden, and financial stress; treat the person, not only the label.
- Poorly controlled symptoms can mimic or worsen anxiety—verify pain, dyspnea, and nausea management.
Red-Flag Symptoms Requiring Urgent Action or Escalation
- Crushing or radiating chest pain, syncope, or hemodynamic collapse
- Severe dyspnea, SpO₂ below expected baseline, or new cyanosis
- Neurologic deficits, sudden thunderclap headache, or seizure
- Active suicidal ideation with intent, plan, or recent attempt
- Psychosis with danger to self or others, or inability to maintain safety
- Signs of severe alcohol or benzodiazepine withdrawal (autonomic storm, confusion, seizure)
Prioritized assessment: safety, mood, and medical contributors
Safety screening, then mental status and vitals
- Immediate safety: self-harm, harm to others, inability to care for dependents, acute agitation
- Airway, breathing, circulation, and SpO₂ when cardiopulmonary symptoms are present
Vital signs and trends
- Serial vitals during symptomatic episodes; compare to baseline when available
- Apply early warning scores per facility policy to quantify deterioration risk
Focused assessment
- Cardiopulmonary exam cues, hydration status, pain score, and neurologic red-flag screen when indicated
- Substance use timeline, recent medication changes, and caffeine or nicotine intake
- Brief mood and anxiety screening tools when approved for your setting—document scores and follow-up actions
Immediate Non-Pharmacological Nursing Interventions
Therapeutic presence
- Calm pace of speech, clear expectations, and permission to ask questions
- Private space when possible; reduce alarms and crowd noise
Physiologic calming skills
- Slow paced breathing or boxed breathing when not contraindicated—coach gently and avoid forcing
- Grounding: orient to place, time, and supportive person; offer cold water if appropriate
Care coordination
- Notify provider for red flags, abnormal vitals, or worsening symptoms
- Involve mental health liaison, social work, or crisis services per protocol—especially when safety risk is present
Nursing Documentation Focus
Key elements
- Patient words in quotes, onset, duration, triggers, and what improves or worsens symptoms
- Objective signs: vitals, SpO₂, tremor, diaphoresis, motor restlessness
- Interventions provided, education given, and response
- Notifications with times; screening tools used and results
Example nursing note
“2140: Pt c/o ‘heart racing’ and worry since 2000. HR 118 bpm, BP 138/86 mmHg, RR 22/min, SpO₂ 97% RA, afebrile. Appears restless, diaphoretic; speech rapid but coherent. Denies chest pain radiating to arm at this time. ECG obtained per protocol; provider updated at 2145. Coached slow breathing x 3 min; HR 104 bpm at 2155. Safety screen negative for SI/HI per facility tool. Will recheck vitals q15 min x1 hr; educate on when to call RN immediately.”
How This Symptom May Progress
- Time-limited situational anxiety may resolve when stress eases or coping strategies are reinforced
- Persistent worry with avoidance can narrow activity and worsen sleep, creating a reinforcing loop
- Unaddressed medical drivers (thyroid disease, arrhythmia, anemia) may produce escalating somatic anxiety despite reassurance
- Co-occurring depression or substance use can change trajectory—monitor function, safety, and adherence
Trajectory beats adjectives. The same word “anxious” means something different when vitals are stable versus when oxygenation is falling—document both the story and the measurable trend.
Escalation Criteria
Escalation balances safety, stability, and scope of practice.
- Cardiopulmonary instability, suspected stroke, seizure, or loss of consciousness
- Imminent self-harm or harm to others; weapons concern
- Severe withdrawal syndromes with confusion or autonomic storm
- Worsening symptoms despite initial nursing measures and stable baseline
- New focal neurologic signs, persistent tachycardia with unclear cause, or repeated unwitnessed syncope
- Stable anxiety symptoms with agreed follow-up; document warning signs that should trigger earlier return
Clear documentation of objective findings and timely escalation supports safer care when anxiety overlaps with serious medical conditions.
💡 Clinical Pearls
- Never “reassure away” first-time severe chest pain or dyspnea—follow protocol even when anxiety is present.
- Ask what changed in the last 24–48 hours: substances, caffeine, sleep, medications, or new stressors.
- Pair emotional validation with concrete next steps: vitals, ECG timing, provider notification, and revisit times.
- Language matters—swap “just anxiety” for “anxiety symptoms with stable vitals after assessment per protocol.”
Chronic illness questions patients search (life impact & coping)
These phrases reflect common patient search language (plain-language intent), including seriousness, urgency, and when-to-seek-care queries that often accompany symptom searches. This block is written for clinicians and nurses: use it to guide history-taking, anticipate concerns, and align education—not as direct answers to give patients verbatim.
| Patient question (search language) | How to use this in practice (staff) |
|---|---|
| Will this affect my daily life long-term? | Opens goals, occupational impact, and follow-up planning. |
| What lifestyle changes actually help? | Maps to evidence-based self-management without diagnosing. |
| How do I explain this to family or work? | Stigma and disclosure; coordinate education and reasonable adjustments messaging. |
| Is it normal to feel anxious or low with this? | Psychosocial screening language; escalate per mental-health pathways when appropriate. |
| Why do symptoms come and go? | Expect variability; document pattern, triggers, and remission periods. |
| What should I track between visits? | Symptom diaries and trends—supports shared decision-making. |
Frequently Asked Questions (FAQ)
1. Is anxiety always a mental health disorder?
No. Anxiety as a symptom may be associated with primary anxiety disorders, but it can also appear with medical illness, substance withdrawal, medication effects, pain, and situational stress. Nurses document observations and support evaluation rather than labeling the cause at the bedside.
2. When should nurses prioritize medical causes before assuming anxiety?
When there are cardiopulmonary red flags, focal neurologic signs, severe or abrupt onset, fever, hypoxia, syncope, or vital sign instability—treat as potentially medical until assessed. In older adults and delirium-risk patients, new anxiety may overlap with infection or metabolic derangement.
3. How is anxiety different from a panic attack?
Panic attacks are intense surges of fear and symptoms that peak within minutes; they may occur in several contexts. Some patients have recurrent unexpected attacks that may be associated with panic disorder, but nurses avoid diagnosing—document timing, associated vitals, and triggers, and escalate if symptoms mimic acute coronary or pulmonary emergencies.
4. Can anxiety cause chest pain or shortness of breath?
Yes—hyperventilation, muscle tension, and autonomic arousal can mimic cardiopulmonary complaints. Because serious conditions can present similarly, nurses follow facility protocols for concerning features, repeat vitals, and timely escalation rather than reassuring away red flags.
5. What is safest documentation language for anxiety?
Describe patient-reported words in quotes, observable signs (restlessness, tremor, tearfulness), vitals and trends, screening tools completed, notifications, and avoid diagnostic certainty. Example: Patient reports overwhelming worry since yesterday; HR 108 bpm; appears diaphoretic; safety screen completed per protocol; provider notified.
6. Are there pediatric-specific considerations?
Children and adolescents may show stomachaches, irritability, school refusal, sleep problems, or behavioral regression rather than saying they feel anxious. Use developmentally appropriate questions, involve caregivers when appropriate, and follow child and adolescent mental health pathways when safety concerns arise.
7. Can medications cause or worsen anxiety?
Some bronchodilators, corticosteroids, stimulants, and withdrawal from alcohol or benzodiazepines may increase arousal or mimic anxiety. Nurses monitor timing of changes, adherence, and objective trends and report to prescribers without independently attributing causation.
8. When should nurses activate crisis or psychiatric emergency pathways?
When there is imminent risk of self-harm or harm to others, inability to care for basic needs, severe psychosis, or incapacitating agitation—follow facility tools and chain-of-command. Anxiety alone is not an emergency, but safety always drives urgency.
References
[1] National Institute for Health and Care Excellence. Generalised anxiety disorder and panic disorder in adults: management. Clinical guideline (check current update). https://www.nice.org.uk/guidance/cg113
[2] National Institute of Mental Health. Anxiety disorders — information for professionals and the public (use current NIH pages). https://www.nimh.nih.gov/health/topics/anxiety-disorders
[3] Centers for Disease Control and Prevention. Mental health — workplace and population health resources. https://www.cdc.gov/mentalhealth/
[4] World Health Organization. Mental health — anxiety disorders overview (regional materials may vary). https://www.who.int/news-room/fact-sheets/detail/anxiety-disorders
[5] Bandelow B, Michaelis S, Wedekind D. Treatment of anxiety disorders. Dialogues Clin Neurosci. 2017;19(2):93-107. doi:10.31887/DCNS.2017.19.2/bbandelow
[6] StatPearls Publishing. Anxiety Disorders. Treasure Island (FL): StatPearls Publishing; use current edition. https://www.ncbi.nlm.nih.gov/books/NBK470361/
[7] American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 5th ed., text revision. Arlington, VA: American Psychiatric Association; 2022 (clinical criteria reference—licensed clinicians apply criteria).
Disclaimer: This content is for informational and educational purposes only and is intended for nursing professionals and students. It supports assessment and communication; it does not replace medical diagnosis, prescribing decisions, or licensed clinician judgment. Nursing practice focuses on objective observation, trending, and escalation per protocol—not labeling a condition at the bedside. Clinical assessment requires correlation with history, examination, and diagnostic testing. This information does not replace clinical judgment, institutional protocols, or current evidence-based practice guidelines. Not medical advice. Always follow your facility’s specific policies and escalation procedures. No conflicts of interest to disclose.