A fluid imbalance refers to an abnormal level of fluids in the body.
Your body is constantly losing fluids through breathing, sweating, and urinating. If you do not take in enough fluids, you may become dehydrated.
Your body may also have a hard time getting rid of fluids, allowing excess fluid to build up. This is called fluid overload.
Many illnesses can cause fluid imbalance:
Seifter JL. Potassium disorders. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 118.
Verbalis JG. Posterior pituitary. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 243.
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