What Are the Symptoms of Pneumonia?

Pneumonia is a common infection that causes the air sacs (alveoli) in the lungs to fill with fluid or pus. The symptoms and severity of pneumonia can vary, depending on the germ that caused it — bacteria, a virus, or fungi — as well as your age and your overall health.

If you even have a slight suspicion that you or someone you know has pneumonia, don’t wait to see if the condition gets worse. Call a doctor as soon as possible — especially if you or a loved one is at high-risk for severe pneumonia. Most cases can be treated successfully, but the sooner you get treatment, the better.

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Written by:

Brittany Doohan

Brittany Doohan was the Content Director at HealthiNation and is currently the Editorial Director at Medscape. Through her work with Medscape, she won a Silver Telly Award in May 2022 for "Sleepless Nation: A Public Health Epidemic — Episode 2: A Decade Without a Diagnosis." She has worked in health journalism and video production for more than 8 years, and loves the challenge of explaining complex topics in an easy-to-understand and creative way.

Reviewed by:

Karen Hovav, MD, FAAP

Karen Hovav, MD, FAAP, has more than 15 years of experience as an attending pediatrician. She has worked in a large academic center in an urban city, a small community hospital, a private practice, and an urgent care clinic.

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