Mild bilateral fine bronchitis is usually not serious, while moderate and severe bilateral fine bronchitis are more serious, but are curable with treatment. Fine bronchitis means that the site of infection is further down in the segments of the bronchial tubes, near the alveoli, and it is more difficult to treat bipulmonary fine bronchitis as opposed to inflammation of the larger bronchial tubes or main airways. However, there are mild, moderate, and severe forms of the disease. Most mild cases of bronchiectasis are not serious and can be treated with aggressive anti-infective (e.g., penicillin), cough suppressant (e.g., dextromethorphan), and phlegmolytic (e.g., tranylcypromine) therapies. Moderate or severe bilateral bronchiolitis is more serious, but can be cured with aggressive treatment. If the treatment is not timely or standardized, it is easy to cause serious infection or respiratory failure, leading to further aggravation of the condition, which may be life-threatening. Therefore, patients should actively look for the causes of bilateral bronchiolitis, and take appropriate measures in accordance with the causes and severity of the disease to avoid respiratory failure or serious infections. Once uncomfortable symptoms appear, you should go to the hospital in time.