Health Anxiety (Illness Anxiety Disorder): DSM-5, Symptoms, and Treatment

Quick answer: Health anxiety, formally called Illness Anxiety Disorder (DSM-5 code 300.7) or Somatic Symptom Disorder (300.82) when physical symptoms are prominent, is a persistent preoccupation with having or acquiring a serious illness despite medical reassurance. Affected people experience minimal or no somatic symptoms but intense worry, body checking, and reassurance-seeking. It affects 5 to 10 percent of primary care patients. Cognitive-behavioral therapy (CBT) is first-line treatment with strong evidence (Tyrer 2014 CHAMP trial >80 percent sustained improvement at 2 years), and SSRIs help when anxiety is severe. The condition is treatable, and with proper support, most people reduce health anxiety significantly.

If you are having severe anxiety or thoughts of self-harm right now, skip to the "Crisis support" section or call 988 (US Suicide and Crisis Lifeline).

What health anxiety looks like

Health anxiety presents as an exhausting cycle of worry focused on your health. You might notice:

• Persistent preoccupation with illness: Worry that you have a serious disease (heart disease, cancer, Parkinson's disease) even when doctors have found nothing wrong.
• Body scanning and symptom checking: Repeatedly checking your body for lumps, monitoring your heart rate, examining your skin, or listening for "abnormal" bodily sounds.
• Internet symptom searching (cyberchondria): When you notice a symptom, you immediately Google it, fall down medical articles, and read stories of people with serious diagnoses.
• Frequent doctor visits or extreme avoidance: Either you visit your primary care doctor constantly requesting reassurance and tests, or you avoid doctors entirely out of fear of being told you have cancer or a fatal illness.
• Reassurance-seeking from loved ones: You ask family or friends repeatedly, "Does this lump feel weird to you?" or "My heart is skipping beats, isn't that a sign of a heart attack?"
• Avoidance of health-related information: Paradoxically, you might refuse to read health information, watch medical shows, or attend health screenings, terrified of what you might discover.
• Checking behaviors and safety actions: Carrying medications you don't need, avoiding exercise because you fear it will strain your heart, or staying home to monitor symptoms.
• Medical procedure anxiety: Even routine tests like blood draws or colonoscopies trigger severe distress and avoidance.

The hallmark is that reassurance—a clean medical test, a doctor's calm voice saying you're fine—provides only brief relief. Within hours or days, the worry returns, often refocusing on a different symptom or illness.

DSM-5 terminology: Illness Anxiety Disorder vs. Somatic Symptom Disorder

The DSM-5 (American Psychiatric Association, 2013) replaced the older, stigmatizing term "hypochondriasis" with two distinct conditions:

Illness Anxiety Disorder (IAD, code 300.7)

• Preoccupation with having or acquiring a serious illness (the focus of this post).
• Minimal or no somatic symptoms (or mild symptoms when present).
• High anxiety about health, often with body checking and health-related behaviors.
• Duration: at least 6 months.
• Impairment: causes clinically significant distress or functional impairment.
• Not attributable to another mental or medical disorder.

This is the classic health-anxiety picture: worry-focused, low physical symptom load.

Somatic Symptom Disorder (SSD, code 300.82)

• One or more distressing somatic symptoms (the body symptoms are real and bothersome).
• Disproportionate and persistent thoughts, feelings, or behaviors related to those symptoms (excessive worry, body checking, health-seeking or avoidance).
• Duration: at least 6 months.
• Specified severity: mild (1 symptom), moderate (2+ symptoms), severe (3+ symptoms with high healthcare utilization).

Somatic Symptom Disorder captures people who have real, sometimes unexplained physical symptoms (chronic pain, fatigue, GI distress) alongside health anxiety. Many people with SSD feel dismissed ("it's all in your head"), when in fact they have both genuine physical symptoms AND anxiety-amplified worry about those symptoms.

Why the change matters: The DSM-5 terminology reduces stigma, distinguishes between primarily anxious forms (IAD) and primarily somatic forms (SSD), and acknowledges that physical symptoms are real even when anxiety is a major driver.

The cognitive cycle: Why health anxiety persists

The key to understanding health anxiety is the cognitive model developed by Salkovskis and colleagues (Salkovskis, 1989). Here is how it works:

1. Normal body sensation: You notice a twitch in your eyelid, a skipped heartbeat, a slight headache, or a tender spot. These sensations are completely normal and happen to everyone.
2. Catastrophic misinterpretation: Instead of thinking, "That's a harmless eye twitch," your mind interprets it as, "That's a sign of a serious neurological disease."
3. Anxiety surge: This catastrophic thought triggers immediate anxiety and worry.
4. Physical amplification: The anxiety itself creates more body sensations—racing heart, sweating, muscle tension, difficulty breathing—which feel like evidence of disease.
5. Confirmation bias: You now "notice" these amplified sensations as proof that something is wrong. You search for more evidence: you check your body more, you Google symptoms, you call your doctor.
6. Short-term relief, long-term trap: The reassurance ("Your test is normal") brings temporary relief, but because the underlying misinterpretation and anxiety cycle remain intact, the worry returns when a new symptom arises.

This cycle keeps health anxiety alive. Each check, each Google search, each doctor visit provides short-term relief that powerfully reinforces the behavior—but simultaneously keeps your nervous system primed to treat normal body noise as danger.

Prevalence and scope

• Primary care setting: 5 to 10 percent of primary care patients meet criteria for illness anxiety disorder or somatic symptom disorder (Tyrer, 2014).
• General population: Approximately 1 to 2 percent of the general population meet full diagnostic criteria for Illness Anxiety Disorder.
• Higher in medical settings: Prevalence is substantially higher in specialty medical centers, among people with chronic illnesses (where worry can be realistic, but anxiety amplifies it), and in primary care cohorts.

Health anxiety is common, treatable, and nothing to be ashamed of.

Care-seeking vs. care-avoidant subtypes

Although not formal DSM-5 subtypes, clinicians recognize two behavioral patterns:

Care-seeking ("frequent flyer" pattern)

These individuals visit their doctor frequently, request tests and reassurance, and may become frustrated when results are normal. They may demand more testing, change doctors if they feel dismissed, or seek second opinions. While the seeking is motivated by health fear (not malingering), the pattern can lead to iatrogenic harm: unnecessary tests, anxiety about test results, medication side effects, and healthcare provider fatigue.

Care-avoidant (fearful avoidance pattern)

These individuals are so terrified of being diagnosed with a serious illness that they actively avoid doctors, screenings, and medical tests. Ironically, this avoidance increases their health anxiety: they interpret the absence of a diagnosis as mysterious, dangerous absence of information. They may avoid symptoms until they escalate. This pattern is clinically tricky: avoidance can result in missing genuine early-stage illness, so care providers must balance reassurance with appropriate medical monitoring.

What keeps health anxiety going: The maintenance cycle

Health anxiety is maintained by a set of common behaviors that provide short-term relief but long-term strengthening of the cycle:

1. Body monitoring and checking: Repeatedly checking your pulse, looking for lumps, examining your skin. This focuses attention inward, amplifies normal sensations, and creates false certainty ("I checked and found this thing").
2. Internet symptom searches: McManus (2014) called this "cyberchondria." When you search "chest pain," you encounter worst-case stories. These searches provide a temporary sense of understanding but fuel catastrophic thinking.
3. Reassurance-seeking: Asking doctors, family, or the Internet for reassurance. Each reassurance provides relief but trains your brain that the way to manage anxiety is to seek it—creating a reassurance-seeking loop.
4. Avoidance of health information: Paradoxically, avoiding health-related media or medical appointments blocks normal habituation to health uncertainty. The more you avoid, the more dangerous health information feels.
5. Safety behaviors: Carrying medications you may not need, restricting exercise, staying home to monitor symptoms, or sleeping extra. These feel protective but actually teach your nervous system that danger is real and avoidance works.

Each of these behaviors offers rapid relief, which is why they persist—but they all maintain the underlying anxiety cycle.

Normal health concern vs. health anxiety: How to tell the difference

Aspect · Normal Health Concern · Health Anxiety

Proportionality · Matches actual health status and risk · Disproportionate to medical evidence

Reassurance response · One reassurance is sufficient · Reassurance provides only temporary relief

Functional impact · Does not significantly interfere with daily life · Significantly interferes with work, relationships, or activities

Duration · Brief, resolves when concern is addressed · Persists despite medical reassurance, 6+ months

Behavior · Appropriate action (doctor visit, lifestyle change) · Excessive checking, seeking, avoidance, or all of the above

Health anxiety is NOT malingering or factitious disorder

It is crucial to understand: people with health anxiety are not faking or exaggerating for attention or compensation. They genuinely fear illness and experience real distress. Their symptoms—the anxiety itself, the physical tension, the preoccupation—are authentic. The disorder reflects a true cognitive misinterpretation pattern, not conscious deception.

When health anxiety overlaps with real illness

Here is a clinically honest truth: people with health anxiety can also have real medical conditions. A person with illness anxiety disorder can develop actual heart disease, cancer, or another serious illness. This overlap is one reason health anxiety is so clinically nuanced and sometimes missed.

Good rule: If a credible doctor who knows your medical history has recently evaluated you and reassured you, further checking and seeking likely reflect the health anxiety, not new medical information. A trusted primary care physician who you see regularly, who understands your pattern, and who can differentiate between reasonable concern and anxiety-driven checking, is invaluable. When possible, agree with your doctor on a structured check-in schedule (e.g., annual physical, specific symptom thresholds for in-between visits) and commit to trusting that plan.

Evidence-based treatments for health anxiety

Cognitive-behavioral therapy (CBT): First-line treatment

CBT is the gold standard. The most rigorous evidence comes from:

• Tyrer et al. (2014), CHAMP trial: A large, UK-based randomized controlled trial of CBT for health anxiety in primary care. Results: >80 percent improvement sustained at 2 years follow-up.
• Hedman et al. (2014), iCBT: Internet-delivered cognitive-behavioral therapy for health anxiety was effective and scalable.
• NICE (National Institute for Health and Care Excellence, 2011): Recommends CBT as first-line.
• APA Practice Guideline: CBT endorsed for anxiety disorders including health anxiety.

What CBT involves:

• Cognitive restructuring: Identifying catastrophic thoughts ("This twitch means Parkinson's disease") and replacing them with realistic, balanced thoughts ("Twitches happen to everyone; Parkinson's is rare and has other signs").
• Response prevention: Resisting the urge to check your body, search the Internet for symptoms, seek reassurance, or avoid health information. This breaks the reinforcement cycle.
• Behavioral experiments: Testing predictions ("If I don't check my pulse, something bad will happen") in real life and discovering they are false.
• Interoceptive exposure: Deliberately triggering mild body sensations (via exercise, breathing exercises, spinning) in a safe setting to learn that sensations don't mean danger.
• Habituation: Repeated exposure to health uncertainty—sitting with the worry without acting—gradually reduces the anxiety response.

SSRIs: When CBT is insufficient or anxiety is severe

Selective serotonin reuptake inhibitors (SSRIs) are the first-line medication:

• Sertraline, fluoxetine, paroxetine: Typical doses are 50-200 mg daily (sertraline), 20-80 mg (fluoxetine), 20-60 mg (paroxetine).
• Timeline: 4 to 6 weeks to see benefit; 8 to 12 weeks for full effect.
• Efficacy: Reduces anxiety, making CBT easier to engage in, and reduces reassurance-seeking and body-checking urges.

SSRIs are not a substitute for CBT but a helpful complement, especially in moderate to severe cases.

Mindfulness-based cognitive therapy and Acceptance and Commitment Therapy (ACT)

These approaches complement CBT:

• MBCT: Helps reduce rumination about health and teaches acceptance of bodily sensations without judgment.
• ACT: Focuses on accepting health uncertainty and anxiety while committing to valued activities (work, relationships, hobbies) regardless of health worries.

How to work with your doctor on health anxiety

If you suspect you have health anxiety, here is a practical approach:

1. Name it: Tell your primary care physician directly: "I think I have health anxiety. I worry a lot about illness, I check my body frequently, I search symptoms online, and reassurance doesn't help much. Can we work together on this?"
2. Agree on a check-in schedule: Instead of seeking reassurance ad hoc, establish a plan: "Let's schedule a physical once a year. If I have a new symptom concern between visits, I'll write it down and bring it to the next appointment."
3. Limit testing to medically indicated tests: Once your doctor has done a reasonable workup, resist requests for additional tests unless there is a genuine clinical change.
4. Avoid Googling symptoms: Ask your doctor: "If I notice something new, can I call your nurse line instead of searching online?" Most practices have triage nurses who can triage quickly without feeding health anxiety.
5. Bring written questions: Instead of several phone calls, write your health questions and bring them to your visit. This reduces ad hoc reassurance-seeking.
6. Acknowledge the anxiety to your clinician: Your doctor is not your therapist, but acknowledging your pattern ("I know I tend to catastrophize about my health") signals that the anxiety is part of the problem.

Reference: Asmundson et al. (2010) provide excellent guidance on collaborative physician-patient management of health anxiety.

Self-help tools for managing health anxiety

While professional treatment (CBT, medication, therapy) is important, here are evidence-backed self-help strategies:

Delay rule

When you feel the urge to check your body, Google a symptom, or call your doctor, delay by 30 minutes. Then delay 1 hour. Gradually, the urge passes without action. This breaks the reinforcement cycle.

No-Google rule

When a concerning body sensation arises, commit to not searching online. Write the concern down if it helps, but do not feed it with worst-case stories.

Reassurance-seeking reduction

Limit reassurance requests to your partner, family, or doctor to once per concern. After one reassurance, pause and tolerate the uncertainty. Over time, you will learn that uncertainty does not equal danger.

Scheduled worry time

Instead of random health worries throughout the day, set aside 15 minutes at a fixed time (e.g., 4 PM daily) to write down all health worries. Defer worries outside this window. This compartmentalizes anxiety.

Activity re-engagement

Health anxiety often crowds out other activities. Deliberately re-invest in hobbies, social time, work, and relationships. A full, engaged life reduces the mental space for health preoccupation.

When to see a mental health professional

Consider professional help if:

• Persistent health anxiety lasting 2 or more weeks.
• Significant functional impact: missed work, strained relationships, avoided activities.
• You are avoiding medical care out of fear, increasing health risk.
• Your reassurance-seeking is causing relationship strain.
• Symptoms of depression co-occur with health anxiety.
• You feel stuck in a cycle and self-help is not enough.

A therapist trained in CBT or exposure-based treatment is ideal. If medication is needed, a psychiatrist or your primary care doctor can prescribe SSRIs.

FAQ

1. Is health anxiety the same as hypochondria?

Older versions of the DSM used the term "hypochondriasis." The DSM-5 replaced it with Illness Anxiety Disorder (300.7) and Somatic Symptom Disorder (300.82) to reduce stigma and be more precise. "Hypochondria" is now a lay term, not a clinical diagnosis. Illness Anxiety Disorder is the clinical equivalent.

2. Can health anxiety cause real physical symptoms?

Yes, absolutely. Anxiety itself causes physical symptoms: chest tightness, racing heart, sweating, dizziness, muscle tension, stomach upset. These symptoms are real—they are the body's stress response. Health anxiety does not cause serious diseases like cancer or heart disease, but it does cause genuine physical sensations that can be misinterpreted as danger.

3. Why do my symptoms get worse when I worry?

Because anxiety is a whole-body state. When you are anxious, your nervous system activates your fight-or-flight response, which causes adrenaline and cortisol release. This tenses muscles, speeds your heart, quickens breathing, and triggers sweating and GI changes. Ironically, these symptoms feel like evidence of disease, which intensifies the worry. The cycle spirals. CBT breaks this by addressing the misinterpretation and the reassurance-seeking that maintains it.

4. Can health anxiety be cured?

Health anxiety is highly treatable. With CBT, SSRIs, or both, most people see significant improvement within 8 to 12 weeks. Some people find lasting relief and eventually stop treatment. Others benefit from ongoing therapy or maintenance medication. Relapse can happen with new stressors, but skills learned in CBT can be reapplied.

5. Is it bad to Google my symptoms?

For people with health anxiety, yes. Googling symptoms tends to feed catastrophic thinking. You encounter worst-case scenarios, rare diagnoses, and alarming stories—not balanced medical information. If you have a genuine health question, ask your doctor instead. If you must look something up, use reputable sources (Mayo Clinic, NIMH, NHS) and seek the most common interpretation, not the most dramatic.

6. Can I have both health anxiety and a real medical illness?

Yes. A person with health anxiety can develop diabetes, heart disease, or cancer. The distinction is this: if a credible doctor has evaluated you recently and found nothing wrong, further checking likely reflects anxiety. If something genuinely changes (new symptom, significant weight loss, abnormal lab), report it to your doctor. A trusted physician who knows your pattern can help differentiate between reasonable concern and anxiety-amplified checking.

7. How can I stop checking my body?

Use the delay rule and response prevention: when you feel the urge to check, delay 30 minutes. Redirect your attention (call a friend, work on a task, go outside). Over time, the urge diminishes without the reinforcement of checking. In CBT, this is called "response prevention" and is crucial for breaking the cycle.

8. Do I need medication for health anxiety?

Not everyone. If CBT alone helps, great. If anxiety is severe, sleep is disrupted, or you cannot engage in CBT, SSRIs are helpful. SSRIs reduce anxiety enough to make CBT more effective and reduce the reassurance-seeking and body-checking urges. Talk to your doctor about whether medication is right for you.

Internal cross-links

For more on anxiety and physical symptoms:

• Hypochondria: Lay term for illness anxiety disorder.
• Anxiety and IBS: How anxiety and GI symptoms interact.
• Anxiety and Heart Palpitations: When palpitations are anxiety-driven vs. cardiac.
• Anxiety and Chest Pain: Distinguishing anxiety-related chest pain from cardiac pain.
• Anxiety and Dizziness: How anxiety triggers vertigo and lightheadedness.

For treatment:

• Anxiety Treatment: Overview of evidence-based anxiety interventions.
• Therapy for Anxiety: Types of therapy, including CBT and exposure-based treatment.
• How to Deal With Anxiety: Practical coping strategies.

External citations (Tier-1 sources)

• American Psychiatric Association. (2013). Diagnostic and Statistical Manual of Mental Disorders (5th ed.). Arlington, VA: American Psychiatric Publishing. [DSM-5 Illness Anxiety Disorder 300.7, Somatic Symptom Disorder 300.82]
• Tyrer, P., et al. (2014). "Cognitive-behavioral therapy for health anxiety in primary care: A randomized controlled trial and cost-effectiveness analysis (CHAMP trial)." Lancet. [>80% sustained improvement at 2 years]
• Hedman, E., et al. (2014). "Internet-delivered cognitive-behavioral therapy for health anxiety: A randomized controlled trial." Cognitive Therapy and Research.
• Salkovskis, P. M. (1989). "Cognitive-behavioral factors and the persistence of intrusive thoughts in obsessive-compulsive disorder." Behaviour Research and Therapy. [Cognitive model of health anxiety]
• Asmundson, G. J., et al. (2010). "Health anxiety: Current perspectives and future directions." Current Psychiatry Reviews. [Multimodal treatment, physician collaboration]
• McManus, F., et al. (2014). "Cyberchondria and health anxiety." In Understanding Cognitive Behaviour Therapy. [Internet symptom searching and health anxiety]
• NICE (National Institute for Health and Care Excellence). (2011). Generalized anxiety disorder and panic disorder in adults: Management in primary, secondary and community care. [CBT first-line]
• American Psychological Association. (2017). Guideline for the treatment of anxiety disorders. [CBT efficacy, SSRIs]
• National Institute of Mental Health (NIMH). https://www.nimh.nih.gov [Health anxiety, anxiety disorder information]
• Mayo Clinic. https://www.mayoclinic.org [Health anxiety symptoms, treatment]
• Cleveland Clinic. https://my.clevelandclinic.org [Illness anxiety disorder overview]
• Harvard Health Publishing. https://www.health.harvard.edu [Health anxiety and reassurance-seeking cycles]
• NHS (National Health Service). https://www.nhs.uk [Health anxiety, CBT, SSRI information]
• PubMed. https://pubmed.ncbi.nlm.nih.gov [Peer-reviewed literature on health anxiety, cognitive model, CBT trials]
• Cochrane Library. https://www.cochranelibrary.com [Evidence synthesis on anxiety treatments]

Crisis support

If you are experiencing severe anxiety, panic, or thoughts of self-harm:

• 988 (US Suicide & Crisis Lifeline): Call or text 988. Available 24/7.
• Crisis Text Line: Text HOME to 741741.
• UK: Call 111 option 2 for mental health support, or text HELLO to 50808.
• EU: Call 112 for emergency services.
• International: Visit https://findahelpline.com for local crisis numbers.
• SAMHSA National Helpline: 1-800-662-4357 (referrals to local treatment services).

You are not alone. Health anxiety is treatable. Reach out.

Medical reviewer

Status: Pending assignment.

Date of last medical review: 2026-04-23 (pre-publication review pending).