MedDroidBronchitis vs Pneumonia
Bronchitis vs pneumonia: differences in symptoms, tests and treatment
Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed
Medically reviewedAcute bronchitis is inflammation of the breathing tubes, usually from a virus, and mainly causes a cough that can last up to three weeks. Pneumonia is an infection of the lung air sacs and is usually more serious, with higher fever, breathlessness and sometimes chest pain. A doctor can tell them apart by examining the chest and, if needed, a chest X-ray.
Side-by-side comparison
| Feature | Bronchitis | Pneumonia |
|---|---|---|
| Cause | Usually viruses inflaming the bronchial tubes; smoke and pollution can worsen it | Bacteria, viruses or fungi infecting the air sacs of the lungs |
| Typical symptoms | Cough with or without phlegm, chest soreness from coughing, mild fever, tiredness | Cough, higher fever, chills, breathlessness, fast breathing, sharp chest pain when breathing |
| Onset & timing | Often follows a cold; cough may last 1 to 3 weeks | Over a few days; can follow a cold or flu |
| Key tests | Usually none; chest X-ray only if pneumonia is suspected | Chest examination, chest X-ray, oxygen level, CBC and CRP |
| Treatment approach | Rest, fluids, steam, honey for cough (not for babies under 1 year); antibiotics usually not needed | Antibiotics if bacterial, rest and fluids; hospital care if oxygen is low |
| Danger signs | Breathlessness, high fever or cough lasting over 3 weeks needs review | Low oxygen, confusion, bluish lips, very fast breathing |
General patterns only. Symptoms overlap and vary from person to person. On a phone, scroll the table sideways to see both columns.
How doctors tell them apart
- Fever and breathlessness are usually more marked in pneumonia.
- Doctors listen for crackles in one area of the lung, which suggest pneumonia.
- A chest X-ray shows a patch in pneumonia; it is usually clear in bronchitis.
- Oxygen level is usually normal in bronchitis.
See a doctor urgently if
- Breathlessness or fast breathing
- Chest pain when breathing in
- Coughing up blood
- Confusion or bluish lips
- Cough lasting more than 3 weeks, or with weight loss and night sweats
In an emergency, call your local emergency number (in India: 108 or 112).
Frequently asked questions
Do I need antibiotics for bronchitis?
Usually not. Most acute bronchitis is viral. Antibiotics do not help viruses and can cause side effects.
Can bronchitis turn into pneumonia?
It can, especially in older adults and people with lung or heart disease. Rising fever or breathlessness are signs to get checked.
Why does my cough last so long after bronchitis?
The airways stay irritated for a while after the infection clears. A cough lasting more than 3 weeks should be checked, including for TB in India.
Is bronchitis contagious?
The viruses that cause it can spread. Cover coughs and wash hands.
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Not a diagnosis. This page gives general health information to help you talk to a doctor; it is not medical advice and does not replace an examination or tests. Do not start, stop or change any medicine without a qualified clinician. MedDroid is an AI medical assistant and can make mistakes. In an emergency, call your local emergency number (in India: 108 or 112).