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  1. Pneumonia Symptoms and Warning Signs - WebMD

    Apr 8, 2024 · Early signs, such as fever, dry cough, headache, and weakness, will look like the flu but get worse in a day or two. You'll cough more and have shortness of breath and muscle pain. You …

  2. Pneumonia: Causes, Symptoms, Diagnosis & Treatment

    Pneumonia is a lung infection caused by bacteria, viruses or fungi. Fluid and inflammation in your lungs makes breathing hard and causes fever and other symptoms.

  3. What Does Pneumonia Feel Like? - Health

    Jul 13, 2025 · The signs and symptoms of pneumonia include chest pain, difficulty breathing, and fatigue. Pneumonia can have overlapping symptoms with colds and flus but can be life-threatening.

  4. Pneumonia - Symptoms and causes - Mayo Clinic

    Jun 13, 2020 · 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 …

  5. Pneumonia Symptoms and Diagnosis - American Lung Association

    Aug 14, 2025 · Pneumonia symptoms can be mild to severe and depend on the type of germ causing the infection, your age and overall health. Learn about signs and symptoms as well as how …

  6. Top 10 Early Warning Signs of Pneumonia (2025)

    Sep 17, 2025 · It can be caused by various infectious agents, including bacteria, viruses, and fungi, leading to symptoms such as coughing, fever, and difficulty breathing. Watch this video or keep …

  7. Pneumonia - Symptoms | NHLBI, NIH

    Mar 24, 2022 · Learn about the symptoms of pneumonia.

  8. Pneumonia Symptoms: How to Recognize Early Warning Signs

    Dec 19, 2025 · Know that pneumonia symptoms can vary, but watch for cough, fever, and fatigue. Seek help if symptoms like shortness of breath, chest pain, or confusion occur. Pneumonia can be more …

  9. Pneumonia: Symptoms, Causes, and Treatment - Harvard Health

    Jun 24, 2024 · Most cases of pneumonia are caused by bacteria or viruses, but pneumonia can also be caused by fungi. The symptoms of pneumonia can range from mild to severe, and include cough, …

  10. Pneumonia - Johns Hopkins Medicine

    Mycoplasma pneumonia has somewhat different symptoms, which include a severe cough that may produce mucus. How is pneumonia diagnosed? Diagnosis is usually made based on your recent …