The complications of bronchial asthma are divided into acute and chronic complications. Acute complications, which occur during a severe asthma attack, mainly include pneumothorax, mediastinal emphysema, severe hypoxia, respiratory failure, leading to severe arrhythmias, electrolyte disturbances, and in severe cases, coma and death. Chronic complications are mainly due to chronic changes in bronchial asthma leading to airway remodeling, chronic airway inflammation, and chronic narrowing. The complications at this stage mainly include chronic respiratory failure and pulmonary heart disease.