For a one-year-old baby with diarrhea, consider the following: First, if the baby has eaten a lot that day, such as corn-type fiber-containing foods, there will be a transient diarrhea. If this is the case, there is no need to intervene too much, just observe. Secondly, if the baby has diarrhea more than 3-4 times a day, pay attention to observe the nature of the baby’s stool, if it is dilute and watery, like egg soup, usually caused by viral infections. It is a self-limiting disease and will heal in about 1 week. During this period, we should observe the baby’s urine output to see if there is any decrease in urine, or if there are any tears when he cries, as well as if there is any special dryness and dehydration of the skin, and we should give him some oral rehydration salts in time, and if necessary, we can also give him some medicines to help digestion. If the baby’s stool contains mucus, pus and blood, accompanied by poor mental health, fever, abdominal pain symptoms, we should pay attention to whether it is dysentery, i.e., infectious diarrhea, if this is the case, we must take the baby to the hospital in a timely manner.