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White foamy mucus can be caused by various factors, including respiratory infections, Allergies, or exposure to irritants like smoke or pollution. It may also indicate conditions such as Asthma or gastroesophageal reflux disease (GERD). When mucus is produced in excess, it can become foamy due to the presence of air bubbles, which can happen during coughing or when mucus is mixed with saliva. If persistent or accompanied by other symptoms, it’s advisable to consult a healthcare professional.

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AnswerBot

2w ago

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