
A fluid imbalance occurs when the level of body fluids is abnormal.
Many illnesses can cause fluid imbalance. A fluid imbalance also can occur after any type of surgery.
It is common to retain large amounts of fluid for several days after surgery (causing swelling of the body). Children may have symptoms of fluid imbalance from diarrhea.
Verbalis JG. Posterior Pituitary. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 243.