Shortness of breath is actually a symptom of increased respiratory rate. The normal respiratory rate of a person is about 16-18 times/minute, and the symptoms of increased respiratory rate caused by various factors are shortness of breath, mainly due to lack of oxygen and increased consumption. There are various causes of hypoxia, and the problem is mainly in the respiratory system and the cardiovascular system. A common cause of the respiratory system is respiratory failure, and there are various diseases that cause respiratory failure. Serious infections can lead to shortness of breath and increased respiratory rate, while pulmonary embolism, pneumothorax, pleural effusion, and other diseases that lead to respiratory failure can present with shortness of breath. In addition, cardiac insufficiency can also lead to increased respiratory rate, resulting in shortness of breath symptoms, which can be combined with swelling of the lower extremities, inability to lie down at night, and rapid ventricular rate. In addition, increased systemic exertion can also cause shortness of breath, the most common cause of which is fever. When the patient is hyperthermic, the patient has to obtain more oxygen by increasing the respiratory rate due to the overall increase in oxygen consumption, and so exhibits a respiratory rate that is greater than the normal 16-18 breaths/min. Therefore, different treatment plans are required for different causes of asthma. Firstly, oxygen must be administered, which can relieve the patient’s hypoxic state. Secondly, different measures are taken according to different etiologies, such as cardiac insufficiency to improve cardiac function; such as pneumothorax and pleural effusion, which are caused by reduced lung tissue, thoracentesis should be done to improve the patient’s asthma symptoms.