The normal number of bowel movements for a 4-month-old baby is 2-3 times a day, with a yellow striped consistency. If diarrhea symptoms arise, there will be an increase in the volume of stools, a dozen or even dozens of times in heavy cases. The stool may be dilute and watery or egg-soup-like, and in severe cases, it may be mucus stool or thick blood stool. At the same time, the baby may show symptoms such as loss of appetite, depression and restlessness. The first step is to find out what is causing the diarrhea, whether it is wind and cold, indigestion, food accumulation, or a bacterial or viral infection due to improper diet. If it is a bacterial infection, consider adding antibiotics to treat it. Parents usually add a probiotic to regulate the gastrointestinal flora.