Acidosis is a condition in which there is too much acid in the body fluids. It is the opposite of alkalosis (a condition in which there is too much base in the body fluids).
The kidneys and lungs maintain the balance (proper pH level) of chemicals called acids and bases in the body. Acidosis occurs when acid builds up or when bicarbonate (a base) is lost. Acidosis is classified as either respiratory or metabolic acidosis.
Respiratory acidosis develops when there is too much carbon dioxide (an acid) in the body. This type of acidosis is usually caused when the body is unable to remove enough carbon dioxide through breathing. Other names for respiratory acidosis are hypercapnic acidosis and carbon dioxide acidosis. Causes of respiratory acidosis include:
Metabolic acidosis develops when too much acid is produced in the body. It can also occur when the kidneys cannot remove enough acid from the body. There are several types of metabolic acidosis:
Other causes of metabolic acidosis include:
Metabolic acidosis symptoms depend on the underlying disease or condition. Metabolic acidosis itself usually causes rapid breathing. Confusion or lethargy may also occur. Severe metabolic acidosis can lead to shock or death.
Respiratory acidosis symptoms can include confusion, fatigue, lethargy, shortness of breath, and sleepiness.
The doctor will perform a physical examination and ask about your symptoms.
Laboratory tests that may be ordered include:
Other tests may be needed to determine the cause of the acidosis.
Treatment depends on the cause.
Acidosis can be dangerous if untreated. Many cases respond well to treatment.
Complications depend on the specific type of acidosis.
All the types of acidosis will cause symptoms that require treatment by your health care provider.
Prevention depends on the cause of the acidosis. Many causes of metabolic acidosis can be prevented, including diabetic ketoacidosis and some causes of lactic acidosis. Normally, people with healthy kidneys and lungs do not have serious acidosis.
Seifter JL. Acid-base disorders. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, Pa: Elsevier Saunders; 2011:chap 120.
Updated by: Brent Wisse, MD, Associate Professor of Medicine, Division of Metabolism, Endocrinology & Nutrition, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.
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