Carbon dioxide retention cannot be eliminated on its own and relies on therapeutic measures such as oxygen therapy, anti-infection, respiratory stimulants, and mechanical ventilation. Carbon dioxide retention can be seen in diseases such as pneumonia, chronic obstructive pulmonary disease, bronchial foreign body, asthma, and heart valve disease. Patients may have symptoms such as deep and fast breathing, dyspnea, chest tightness, headache, dizziness, etc., which can be life-threatening in severe cases. The treatment of carbon dioxide retention is comprehensive, including the treatment of cause and symptom. 1. Anti-causal treatment: antibiotics should be given for bacterial pneumonia; surgery should be considered to correct valve function for heart valve disease; bronchial foreign bodies should be removed as soon as possible. 2. Symptomatic treatment: oxygen therapy should be given to improve the symptoms of hypoxia; respiratory stimulant should be given to increase respiratory function; mechanical ventilation should be given to improve ventilation function; arginine and potassium chloride should be given to improve the acid-base balance disorder. For the treatment of carbon dioxide retention, it is recommended to consult a doctor in time to formulate an individualized plan after systematic examination.