For ordinary phlegm from a cold, allergies, or mild irritation, you can often make it easier to clear naturally:
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Drink plenty of fluids — water, warm tea, or broth can help thin mucus.
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Use warm steam or a humidifier to reduce throat and airway irritation. Avoid very hot steam that could burn you.
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Try honey in warm water or tea for throat irritation and coughing. (Do not give honey to children under 1 year.)
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Gargle with warm salt water if mucus is mainly irritating your throat.
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Sleep with your head slightly elevated if mucus or post-nasal drainage is worse at night.
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Avoid smoking, vaping, and secondhand smoke, which can increase mucus and airway irritation.
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Don’t forcefully suppress a productive cough—coughing helps move mucus out of the airways.
Seek medical care promptly if you have difficulty breathing, chest pain, coughing up blood, bluish lips, confusion, or severe weakness. If phlegm persists for several weeks, repeatedly returns, or comes with fever, wheezing, unexplained weight loss, or worsening cough, it’s worth being evaluated to identify the underlying cause.
If you tell me how long you’ve had the phlegm, its color (clear/white/yellow/green/bloody), and whether you also have cough, fever, wheezing, or shortness of breath, I can narrow down the likely causes and appropriate home measures.
