Respiratory acidosis is a medical condition that occurs when the body accumulates too much carbon dioxide (CO2) due to inadequate breathing. This buildup of CO2 leads to a decrease in blood pH, making it more acidic. Common causes include chronic obstructive pulmonary disease (COPD), severe asthma, or respiratory failure, which hinder the lungs' ability to expel CO2 effectively. Symptoms of respiratory acidosis can include confusion, fatigue, and shortness of breath. Diagnosis typically involves measuring blood gases to assess CO2 levels and pH balance. Treatment focuses on improving ventilation, which may involve oxygen therapy or mechanical assistance in severe cases.