Why Does Mucus Build Up?
Excess mucus or phlegm can occur for many reasons,
including:
Colds and other respiratory infections Get Cold Relief
Allergies
Postnasal drip
Bronchitis
Exposure to smoke or other irritants
Mucus in the throat can also originate in the nose and sinuses and drip downward, a phenomenon known as postnasal drip.
Because the underlying causes vary, persistent mucus shouldn’t automatically be assumed to be “just a cold.”
Does Green or Yellow Mucus Mean You Need Antibiotics?
Not necessarily.
A chest infection can produce green or yellow mucus, but mucus color by itself doesn’t tell you whether antibiotics
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