Babies who are teething do not usually have diarrhea, and if diarrhea occurs, other causes need to be considered. There is no particular correlation between diarrhea and babies having diarrhea during the eruption of milk teeth. The eruption of milk teeth is usually around 4-10 months, during this period of time the baby will appear to suck fingers, drooling, or due to the discomfort of swollen gums, resulting in a reduction in milk, crying, irritability and other phenomena. Diarrhea at this time may be due to the child’s finger sucking, teeth grinding and other bacteria into the gastrointestinal tract, causing gastrointestinal infections, or irritability affects the digestive function leading to diarrhea. If the diarrhea is not frequent and the child is in good spirits, you can pay attention to feeding water and breastfeeding in small amounts. If the child’s diarrhea symptoms are more serious, appear dozens of times of diarrhea, and mental state depressed, need to go to the hospital pediatrician in time, to clarify the cause of the disease and give appropriate treatment. Parents should pay close attention to their children’s signs during the period of tooth eruption, and take timely measures to alleviate their children’s discomfort if any abnormality is detected.