Ten-month-old children with yellow tongue coating may be caused by colds, digestive disorders, liver and gallbladder diseases and other factors. 1. Colds: due to the lower immunity of the pediatric organism, parents in the daily care of improper, caused by colds, may lead to fever, the temperature rises, the body fluid consumption is more, the saliva secretion is reduced, it will make the tongue yellow, may also be accompanied by sneezing, runny nose and other symptoms. 2. Digestive tract dysfunction: improper diet may lead to gastrointestinal dysfunction, which may cause the child’s tongue to become yellow, and may be accompanied by abdominal pain, diarrhea and other symptoms. 3. Liver and gallbladder diseases: Hepatitis B, for example, may lead to liver damage, so that the detoxification function of the liver is weakened, which will make the child’s tongue yellow, may also be accompanied by yellow skin, lighter color of the stools, urine darker and other abnormal manifestations. Ten-month-olds with yellow tongue may also have other causes, such as poor oral hygiene, etc. It is recommended that the child be taken to the doctor for examination and treatment in a timely manner to avoid adverse effects.