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Causes of Bronchiectasis

The most common cause of bronchiectasis is repeated lung infection. This happens in people with chronic lung disease (emphysema, for example).

It is also seen in later life after severe lung infections such as pneumonia in childhood, and it is sometimes present from birth if the baby’s lungs have not developed properly in the womb.

Other causes include inhalation of damaging gases, dust or smoke. The condition is worsened by smoking.

Less commonly, bronchiectasis may be caused by cystic fibrosis, an inhaled foreign body such as a peanut, following tuberculosis, or lung infection in Aids.

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