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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: Causes, Colors, Symptoms, and What It Means (2026)
    Learn what sputum is, why you cough it up, what different colors mean, and when it may signal a respiratory infection or lung problem
  • Sputum - Wikipedia
    Sputum is mucus that is coughed up from the lower airways (the trachea and bronchi) It is commonly referred to as "phlegm" In medicine, sputum samples are usually used for a naked-eye examination, microbiological investigation of respiratory infections, and cytological investigations of respiratory system
  • Phlegm Color Chart: What the Color of Your Phlegm Means
    Producing clear phlegm often means your body is reacting to irritants or inflammation, while yellow or green phlegm may suggest an infection Red, pink, brown, or black phlegm sometimes signify serious issues, such as bleeding, chronic lung conditions, or inhalation of certain substances
  • Understanding Sputum and What the Different Colors Mean
    Sputum is a mix of cells, foreign matter, and white blood cells produced in the respiratory tract An increased amount of sputum is often due to increased respiratory inflammation and is the body's attempt to protect and heal damage to the airways
  • Mucus | American Lung Association
    In the lungs, mucus plays a key role in protecting your lungs and airways from harmful irritants Sputum and phlegm are other names sometimes used to refer to the mucus in your lungs and airways Changes in mucus amount, thickness or color may be a sign of infection or another health condition
  • Sputum: a guide for people with lung conditions
    This guide aims to answer questions about sputum including when and how to take a sputum test and what to do with the results This topic can create anxiety, especially if you have been recently diagnosed
  • Sputum - Physiopedia
    Sputum is not saliva but the thick mucus (sometimes called phlegm) which is coughed up from the lungs The body produces mucus to keep the thin, delicate tissues of the respiratory tract moist so that small particles of foreign matter that may pose a threat can be trapped and forced out
  • Sputum Evaluation (and Sputum Induction) - Harvard Health
    If your doctor thinks you have pneumonia, he or she might examine a sample of your sputum, the phlegm that you cough out of your lungs, to try to determine what type of bacteria or other infectious agent might be the cause





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