Overview
Pneumonia is inflammation of the tiny air sacs in the lungs, often from an infection, which can cause cough, fever, and difficulty breathing. This is general educational information, not medical advice.
Symptoms
- cough, sometimes with phlegm
- fever, sweating, and chills
- shortness of breath
- chest pain when breathing or coughing
Causes
- infection by bacteria, viruses, or fungi
- breathing in irritants in some cases
Risk factors
- very young or older age
- long-term lung or heart conditions
- a weakened immune system
Prevention
- keeping recommended vaccinations up to date
- good hand hygiene
- not smoking
Emergency warning signs
- severe difficulty breathing
- bluish lips or face
- confusion
Evaluation & tests
Educational note: qualified clinicians assess pneumonia with examination, chest imaging, and other tests. This library does not diagnose.
Treatment education
Educational overview: care is individualized by clinicians and depends on the cause and severity. This library does not prescribe.
Self-care
General education: rest, fluids, and following a clinician's plan can support recovery when advised.
When to seek care
Seek professional care for persistent fever, cough, or breathing difficulty.