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How long is a cough considered normal? When does it signal a lung disease?

CK Birla Hospital
Nov 10, 2026 Author: CK Birla Hospital Team
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Cough, phlegm, breathlessness or a feeling of heaviness in the chest are often treated as minor problems, but they can sometimes point to a lung condition. A cough that lasts for a long time, or comes with persistent phlegm, should be taken seriously and checked by a doctor. Breathlessness also needs attention, especially if it is new, worsening or affects daily activities. Smoking and air pollution are major threats to lung health and can raise the risk of lung disease. To protect your lungs, avoid smoking, reduce exposure to polluted air, stay active and get symptoms checked early. Seek medical help promptly for ongoing cough, breathing difficulty or any symptom that worries you or a family member.

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