Dehydration
Diarrhea can cause dehydration. Loss of electrolytes through dehydration affects the amount of water in the body, muscle activity, and other important functions.
Dehydration is particularly dangerous in children, older adults, and people with weakened immune systems. Dehydration must be treated promptly to avoid serious health problems, such as organ damage, shock, or coma—a sleeplike state in which a person is not conscious.
Signs of dehydration in adults include
• thirst
• less frequent urination than usual
• dark-colored urine
• dry skin
• fatigue
• dizziness
• light-headedness
Signs of dehydration in infants and young children include
• dry mouth and tongue
• no tears when crying
• no wet diapers for 3 hours or more
• sunken eyes, cheeks, or soft spot in the skull
• high fever
• listlessness or irritability
Also, when people are dehydrated, their skin does not flatten back to normal right away after being gently pinched and released.
Anyone with signs of dehydration should see a health care provider immediately. Severe dehydration may require hospitalization.
Although drinking plenty of water is important in preventing dehydration, water does not contain electrolytes. Adults can prevent dehydration by also drinking liquids that contain electrolytes, such as fruit juices, sports drinks, caffeine-free soft drinks, and broths. Children with diarrhea should be given oral rehydration solutions such as Pedialyte, Naturalyte, Infalyte, and CeraLyte to prevent dehydration.