What Are the Symptoms of CO2 Retention?

Some symptoms of carbon dioxide retention are fainting, skin that appears bluish, shortness of breath, confusion and an elevated heart rate. The medical term for an elevated level of carbon dioxide in the blood is hypercapnia, reports Congenital Muscular Dystrophy. There can be many causes associated with hypercapnia, including Cushing's disease, chronic obstructive pulmonary disease (COPD), anorexia, vomiting, pulmonary edema and dehydration, notes WebMD.