Hypercapnia refers to the presence of partial pressure of oxygen, partial pressure of carbon dioxide, blood pH, and acid and base balance within the arterial blood gas analysis. If bicarbonate is found in the blood over 11 or carbon dioxide over 45, but the patient does not have significant respiratory failure and is not hypoxemic, it is called hypercapnia. Generally, hypercapnia is not a very serious problem, and is mainly related to a person’s respiratory disease. If there is asthma and chronic obstructive pulmonary disease, it can be treated with bronchodilating drugs. If the fever is caused by metabolic alkalosis, you can correct the alkalosis, appropriate supplementation of some weak acid or arginine treatment, can be very good relief of this disease.