What is the cause of yellow phlegm?

Coughing yellow phlegm sore throat is caused by infections, allergies or asthma. Sinus infections lead to inflammation of respiratory region and accumulation of leukocytes in mucus. When drainage passages are blocked by swollen sinuses the mucus becomes thick and yellow.

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What is the cause of yellow phlegm, cough, and constant sore throat?

Yellow phlegm is a result of an infection. You need to go back to your doctor and let them know that taking out your tonsils did not resolve anything so they can try something else….more

what sickness has characteristics of sore throat, fever, bloody phlegm and coughing?

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how to relieve dry cough and sore throat?

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