Cough, especially if it produces mucus or phlegm
Fever or chills
Shortness of breath
Chest pain that worsens with breathing or coughing
Fast breathing
Fast heartbeat
Fatigue or weakness
Sweating
Loss of appetite
Nausea or vomiting
Confusion, especially in older adults
Bluish lips or fingernails
Symptoms that start after a cold, flu, or respiratory infection
Symptoms that are severe, worsening, or not improving
A doctor’s exam and chest X-ray are needed to confirm pneumonia