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  • Sputum: Definition, colors, causes, and when to see a doctor
    Sputum is a type of thick mucus produced by the lungs This article explains the types of sputum, what causes changes, and when to speak with a doctor
  • Mucus: Phlegm, Causes, Colors How To Get Rid Of It
    It lines your mucous membranes and helps trap and destroy or clear out germs and harmful particles Mucus gets thick and sticky and might be white, yellow or green when you have an infection It’s also called phlegm, snot or sputum Mucus is usually thin and clear
  • Sputum: Definition, Colors, Causes, and Conditions (2025)
    Sputum is a mixture of saliva and mucus coughed up from the respiratory tract, typically as a result of infection or chronic conditions like bronchitis, pneumonia, or tuberculosis It can be clear, yellow, green, or tinged with blood, and its analysis helps diagnose various respiratory diseases


















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