When severe dehydration is combined with pediatric diarrhea, the child will have deep sunken eyes, very poor skin elasticity, few or no tears when crying, sunken fontanelle, and dry mucous membranes of the mouth and lips. As a result of dehydration, the child may have significant abdominal distention, which is caused by potassium deficiency, altered peripheral circulation, fever, mental irritability, depression or lethargy, and in severe cases, coma. Once a child becomes dehydrated, the child should be taken to the hospital for rehydration treatment as soon as possible. Severe dehydration can be life-threatening, and the child should be treated urgently for the cause of the diarrhea, as well as for volume expansion and rehydration treatment.