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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 - 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 …

  3. 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.

  4. 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 …

  5. 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.

  6. 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 …

  7. Pneumonia Symptoms and Diagnosis - American Lung Association

    Aug 14, 2025 · What Are the Symptoms of Pneumonia? Pneumonia symptoms can vary from so mild you barely notice them, to so severe that hospitalization is required. How your body responds to …

  8. What Are the Symptoms of Pneumonia? - GoodRx

    Nov 6, 2025 · 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 …

  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 Symptoms | Signs of Pneumonia - MedlinePlus

    Dec 8, 2023 · What are the symptoms of pneumonia? The symptoms of pneumonia can range from mild to severe and include: The symptoms can vary for different groups. Newborns and infants may not …