Introduction The infant period is a critical period for growth and development, and diarrhea is a common disease. The digestive system of infants and young children is not yet fully developed, and their immunity is not strong. Once diarrhea occurs, it is necessary to treat it in time to avoid delaying the condition. This article elaborates on how to effectively treat diarrhea in infants and young children and allow the baby to grow healthily from the following four aspects. Plan 1: Ensure timely hydration. Infants and young children will lose a lot of water, electrolytes and nutrients after diarrhea. Therefore, ensuring hydration is one of the most important measures to treat diarrhea. Generally speaking, boiling water is used to prepare small packages of oral rehydration solutions.