Bronchial dilatation does not recover on its own; not only does it not recover on its own, it does not recover completely after aggressive treatment. The reason is that bronchiectasis is a structural change, specifically due to the destruction of the elastic tissue of the bronchial muscles, which leads to a lasting dilatation of the bronchi. Persistent dilatation is a fundamental structural change and a completely irreversible process; in layman’s terms, it is impossible to return the dilated bronchial tubes to their original state. As the bronchial tubes undergo dilatation, they exhibit distal enlargement and a smaller diameter in the proximal segment, similar to a flask shape. As a result, it is easy to combine with infection, and symptoms such as repeated coughing, coughing up a large amount of purulent sputum or hemoptysis appear. Treatment is only aimed at clearing the infection and improving the chronic inflammation in the bronchial tubes, but it does not really reverse the dilated bronchial tubes. After bronchial dilatation, it is not possible to recover completely with or without treatment.