What should you know about slight pneumonia?

Pneumonia affects the tiny air spaces and surrounding tissue in the lungs. Inflammation and fluid can make breathing harder and may cause cough, fever, chills, tiredness, chest discomfort or coughing up phlegm. The symptoms and their intensity vary, and an apparently mild illness can worsen.

Pneumonia may follow infection with bacteria or viruses, including influenza or COVID-19. A clinician may listen to the chest, check oxygen levels and decide whether imaging or other tests are needed. A symptom such as cough does not by itself establish pneumonia.

Follow the treatment plan, rest, drink suitable fluids and avoid smoking or vaping while recovering. Take prescribed medicines exactly as directed; antibiotics do not treat viral infections unless a clinician identifies a bacterial reason to use them. Keep useful notes on temperature, breathing effort, chest pain, alertness and fluid intake. Reduce close contact when a contagious respiratory infection is possible.

Seek emergency help for severe breathlessness, blue or grey lips, confusion, collapse, inability to stay awake, or rapidly worsening chest pain. Urgent assessment is also needed when breathing becomes harder, fluids cannot be kept down, fever persists or the person is becoming markedly weaker. Sepsis is a serious complication of infection; new confusion, clammy skin, very fast breathing or profound deterioration should not wait.

What is the likely cause of my pneumonia, and do I need a chest image or oxygen check? Which treatment should I use, and when should breathing or fever begin to improve? What symptoms mean I should return urgently?