Category: General Internal Medicine / Psychiatry / Outpatient & AAU
Introduction: The High-Utilizer Presentation
While acute panic attacks present with dramatic autonomic surges, Health Anxiety (formerly hypochondriasis) and Somatic Symptom Disorders present a different, highly complex challenge for the acute medical team. Patients experiencing severe health anxiety often present repeatedly to Same Day Emergency Care (SDEC), Primary Care, and the Acute Assessment Unit (AAU) with persistent, distressing physical symptoms—such as localized chest pain, persistent fasciculations, abdominal discomfort, or transient paraesthesia.
The clinician’s dilemma is twofold: avoiding invasive, low-yield repeat investigations that reinforce illness behavior, while simultaneously ensuring that true organic pathology is not overlooked due to diagnostic anchoring.
1. The Diagnostic Cycle: “Cyberchondria” & Reassurance Traps
In modern acute practice, health anxiety is frequently amplified by digital self-triage (“cyberchondria”) and wearable health technology (e.g., continuous smartwatch ECGs and pulse oximetry tracking).
The Reassurance Paradox: Providing quick, unexamined verbal reassurance (“Your tests are fine, it’s just anxiety”) or ordering “just one more scan” actually increases long-term anxiety. Unnecessary diagnostic testing validates the patient’s fear that something subtle was missed, leading to a temporary relief cycle followed by rebound health anxiety.
The 2026 Shift: Transition from seeking to “convince” the patient that nothing is wrong to acknowledging the reality of their physical symptoms while shifting the diagnostic focus from disease elimination to symptom management and functional recovery.
2. Medical Conditions That Primary Present as Severe Anxiety
Before attributing long-standing somatic distress to functional anxiety, clinicians must rule out organic “mimics” that directly disturb autonomic and central nervous system regulation:
[Endocrine] [Cardiovascular] [Neurological] [Metabolic/Toxic]
• Phaeochromocytoma • Paroxysmal SVT • Temporal Lobe Epilepsy • Hyperparathyroidism
• Thyrotoxicosis • Postural Tachycardia • Early Multiple • B12 Deficiency
• Hypercortisolism Syndrome (PoTS) Sclerosis • Alcohol/Med Withdrawal
Postural Orthostatic Tachycardia Syndrome (PoTS): Frequently misdiagnosed as panic disorder or generalised anxiety. Validate using a standing 10-minute active stand test ($\Delta \text{HR} \ge 30\text{ bpm}$ without orthostatic hypotension).
Phaeochromocytoma: Rare but critical. Characterized by episodic triad: headache, profuse sweating, and paroxysmal hypertension/tachycardia.
Endocrine Dysfunction: Subclinical hyperthyroidism or hyperparathyroidism ($\uparrow \text{Ca}^{2+}$) can present primarily with neuropsychiatric distress and irritability.
3. Comparing Organic Illness, Panic Disorder, and Health Anxiety
| Clinical Feature | Organic Pathology (e.g., Angina / PE) | Acute Panic Disorder | Health Anxiety / Somatic Symptom Disorder |
| Primary Driver | Tissue ischemia, hypoxia, or structural damage | Sudden surge of autonomic arousal | Persistent misinterpretation of benign bodily sensations |
| Symptom Duration | Tied to physiological triggers/activity | Paroxysmal; peaks within minutes, subsides over 1–2 hours | Chronic, wax-and-wane over weeks to months |
| Healthcare Seeking | Emergency attendance during acute events | Emergency attendance during acute peak | Frequent re-attendance, specialist hopping, repeat testing |
| Response to Testing | Diagnostics yield clear objective abnormality | Normal objective markers; immediate transient relief | Normal objective markers; brief relief followed by doubt |
4. Communication & Management Protocols in the AAU
Validate the Symptom, Not the Catastrophe: Use clear framing: “I believe you are experiencing real, physical pain/palpitations. My job today is to make sure there is no dangerous underlying disease causing this. Your heart and lungs are healthy, but your nervous system’s alarm system is currently turned up too high.”
Set Clear Diagnostic Ceilings: Establish explicit “investigation limits” during the initial consultation to prevent serial ED re-attendances for identical blood panels or imaging.
Evidence-Based Therapeutics:
First-Line: Cognitive Behavioral Therapy (CBT) specifically tailored for Health Anxiety (HA-CBT).
Pharmacotherapy: Selective Serotonin Reuptake Inhibitors (SSRIs) or SNRIs titrated slowly (starting at half-standard doses to avoid initial activation anxiety).
