How should a one-and-a-half-year-old baby have diarrhea? Babies\’ bodies are relatively fragile, and they may have some health problems from time to time. The most common one is diarrhea. Diarrhea is a very common thing for a one-and-a-half-year-old baby, but timely measures need to be taken to avoid further affecting the baby\’s health. This article will elaborate on how to deal with loose stools in a one-and-a-half-year-old baby from the following four aspects. 1. Drink more water and replenish water in time.