Pneumonia is an infection that inflames the air sacs in one or both lungs. The air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, chills, and difficulty breathing. A variety of organisms, including bacteria, viruses and fungi, can cause pneumonia . Learn how to recognize the initial symptoms of pneumonia , such as fever, coughing, headache, and muscle pain, and when to seek medical attention. This article provides evidence-based information and tips for healthy lungs. Learn how to tell the difference between pneumonia and a cold or the flu, and what to look out for in children and babies. Find out the common symptoms of bacterial, viral, and walking pneumonia , and when to call your doctor. What is pneumonia ? Pneumonia is an infection of the lungs. It causes the air sacs (alveoli) of the lungs to get inflamed (irritated and swollen). They may fill up with fluid or pus. This causes a variety of symptoms , which range from mild to severe. Pneumonia is usually caused by bacteria or a virus. It […]
