Symptom Combination

Fatigue and Shortness Of Breath: Causes, Conditions & When to See a Doctor

Fatigue with dyspnea at rest or with minimal exertion suggests heart failure, anemia, pulmonary hypertension, COPD, or hypothyroidism as the underlying systemic process. This combination in heart failure reflects reduced cardiac output causing both exercise intolerance and breathlessness.

→ Fatigue Overview → Shortness Of Breath Overview

Possible Causes of Fatigue and Shortness Of Breath

Conditions that commonly cause both symptoms together

1Heart failure (systolic or diastolic dysfunction)
2Severe anemia with reduced oxygen-carrying capacity
3Pulmonary hypertension with exercise limitation
4COPD or interstitial lung disease with fatigue + exertional dyspnea
5Hypothyroidism with fatigue and accumulation of pleural effusion

Emergency Red Flags

Seek immediate medical attention if you experience any of these

Orthopnea (dyspnea lying flat) + fatigue (advanced heart failure)

Paroxysmal nocturnal dyspnea + fatigue + ankle oedema

Hb < 70 g/L with both fatigue and dyspnea

Right heart failure signs: raised JVP + peripheral oedema + fatigue + dyspnea

New exertional dyspnea developing over weeks with increasing fatigue

When to See a Doctor

Schedule a medical consultation if you notice these signs

Urgent cardiology review if heart failure is suspected

Full blood count to exclude anemia

BNP or NT-proBNP for heart failure screening

Echocardiogram to assess cardiac function

Conditions That Cause Both Fatigue and Shortness Of Breath

41 conditions are associated with this symptom combination

Bronchitis is inflammation of the bronchial tubes that carry air to the lungs. Acute bronchitis is usually caused by viruses and resolves in 2â€“3 weeks. Chronic bronchitis is a form of COPD caused by long-term irritation, often from smoking.

Pneumonia is an infection that inflames the air sacs (alveoli) in one or both lungs, which may fill with fluid or pus. It can be caused by bacteria, viruses, or fungi and ranges from mild to life-threatening.

Anemia is a condition where the blood lacks enough healthy red blood cells or hemoglobin to carry adequate oxygen to tissues. Iron deficiency is the most common cause worldwide. Symptoms include fatigue, pallor, shortness of breath, and dizziness.

Anxiety Disorder

Anxiety disorders are among the most common mental health conditions, characterized by excessive fear, worry, or nervousness that interferes with daily activities. Types include generalized anxiety disorder (GAD), panic disorder, and social anxiety.

Heart failure occurs when the heart cannot pump enough blood to meet the body's needs. It is a chronic condition that causes fatigue, shortness of breath, and fluid retention (edema). It requires ongoing medical management.

Cardiac Arrhythmia

Cardiac arrhythmia refers to irregular heart rhythms â€” the heart beats too fast, too slow, or with an irregular pattern. Some arrhythmias are harmless, while others (like atrial fibrillation) significantly increase the risk of stroke and heart failure.

COVID-19 is an infectious respiratory disease caused by the SARS-CoV-2 virus. Symptoms range from mild (fever, cough, fatigue) to severe (pneumonia, respiratory failure). Long COVID affects some patients with persistent symptoms lasting months.

Lung cancer is the leading cause of cancer-related death worldwide, most commonly caused by smoking. It is categorized into non-small cell (NSCLC, 85%) and small cell (SCLC) types, with symptoms including persistent cough, blood in sputum, weight loss, and chest pain.

Explore Individual Symptoms

In-depth pages for each symptom in this combination

Fatigue — Full Overview Causes Treatment When to See a Doctor Related Questions

Shortness Of Breath — Full Overview Causes Treatment When to See a Doctor Related Questions

Medical Questions About Fatigue and Shortness Of Breath

Evidence-based answers from medical experts

Early Signs of Bronchitis How to Manage Bronchitis Early Signs of Pneumonia How to Manage Pneumonia Early Signs of Anemia How to Manage Anemia Early Signs of Anxiety Disorder How to Manage Anxiety Disorder

Clinical Matches — Authority Pages

Condition-level differential and comparison resources for this combination

⚠ Dangerous — Rule Out First:

Differential analyses:

🔬Sepsis: differential →🔬Cardiac Tamponade: differential →🔬Atrial Fibrillation: differential →

Condition comparisons:

⇄Cardiac Tamponade vs Pericarditis →⇄Heart Failure vs Pulmonary Edema →

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