If the patient develops shortness of breath and insomnia is caused by the following factors: 1. The most common cause is chronic pulmonary insufficiency. A series of lung function changes such as chronic obstructive pulmonary emphysema, chronic pulmonary heart disease, chronic pulmonary hypertension, chronic bronchial dilatation will occur when there is an imbalance in the ratio of ventilation and blood flow, and the supply in the lungs is insufficient, so shortness of breath will occur. At this time, the arterial oxygen saturation is insufficient, the partial pressure of carbon dioxide is too high, and the partial pressure of oxygen is too low, so it also produces insomnia during sleep.2. Shortness of breath and insomnia are closely related to phenomena caused by coronary artery ischemia and hypoxia, especially when there is ischemia in the coronary arteries of the heart, or when there is a transient spasm due to plaque in the coronary arteries of the heart, there will also be shortness of breath and chest tightness, accompanied by insomnia.3. Insomnia is also associated with cerebrovascular insufficiency of blood supply. Insomnia accompanied by shortness of breath may also occur in the case of increased intracranial pressure or in the case of cerebral artery stenosis.