An enema is the insertion of a solution into the rectum and lower intestine given to remove feces when an individual is constipated or impacted or in preparation for an examination or surgery, or to give drugs or anesthetic agents. The rectal tube used to give the enema should be smooth and flexible to decrease the possibility of damage to the lining of the rectum. Tap water is commonly used for adults but should not be used for infants because of the danger of electrolyte (substance that conducts electric current within the body and is essential for sustaining life) imbalance. The colon absorbs water, and repeated tap water enemas can cause cardiovascular overload and electrolyte imbalance. Repeated saline enemas can cause increased absorption of fluid and electrolytes into the bloodstream, resulting in overload. Individuals receiving frequent enemas should be observed for overload symptoms that include dizziness, sweating, or...