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  1. COPD - Symptoms and causes - Mayo Clinic

    Aug 30, 2024 · More mucus or changes in mucus color or thickness. Fever. When to see a doctor Talk with your doctor or other healthcare professional if your symptoms don't get better with treatment or if …

  2. Bronchitis - Symptoms and causes - Mayo Clinic

    Jul 31, 2024 · The lining of the tubes that carry air to and from your lungs is inflamed. Signs and symptoms include cough, mucus, fatigue and chest discomfort.

  3. Mucus in stool: A concern? - Mayo Clinic

    May 30, 2024 · Larger amounts of mucus in stool, associated with diarrhea, may be caused by certain intestinal infections. Bloody mucus in stool or mucus along with belly pain may signal a more serious …

  4. Guaifenesin (oral route) - Side effects & dosage - Mayo Clinic

    Feb 1, 2026 · Guaifenesin is used to help clear mucus or phlegm (pronounced flem) from the chest when you have congestion from a cold or flu. It works by thinning the mucus or phlegm in the lungs.

  5. Acute sinusitis - Symptoms and causes - Mayo Clinic

    Aug 29, 2023 · Acute sinusitis is most often caused by the common cold. Signs and symptoms may include a blocked and stuffy (congested) nose, which may block your sinuses and prevent drainage …

  6. Laryngitis - Symptoms & causes - Mayo Clinic

    Sep 20, 2025 · The spaces inside the nose and head become inflamed, and too much mucus drips into the back of the throat. Less common causes of chronic laryngitis include infections from bacteria, …

  7. Atelectasis - Symptoms and causes - Mayo Clinic

    Nov 8, 2023 · Mucus plug. A mucus plug is a buildup of sputum or phlegm in your airways. It commonly occurs during and after surgery because you can't cough. Drugs given during surgery make you …

  8. Asthma - Symptoms and causes - Mayo Clinic

    Mar 8, 2025 · Asthma is a condition in which your airways narrow and swell and may produce extra mucus. This can make breathing difficult and trigger coughing, a whistling sound (wheezing) when …

  9. Common cold - Symptoms and causes - Mayo Clinic

    May 24, 2023 · The mucus from your nose may start out clear and become thicker and yellow or green. This change is normal. Most often, it doesn't mean that you have a bacterial illness. When to see a …

  10. Cold symptoms: Does drinking milk increase phlegm? - Mayo Clinic

    Jun 13, 2023 · Colds mean extra thick and sticky mucus, but dairy milk doesn't make phlegm worse.