Acute diarrhea is a common problem, especially in infants and young children. The most frequent causes are gastrointestinal infections, primarily viral and bacterial, with less common factors being involved. The main complications of the condition are dehydration and negative nutritional balance. The cornerstone of therapy for this condition is the prevention and correction of dehydration, as well as meeting nutritional needs. Depending on the severity of the disorder, fluid and electrolyte replacement is done either intravenously or with oral rehydration solutions, while the diet, except in certain cases, should remain the same as before the onset of the illness.