Children should drink warm water and warm milk after biting the thermometer, especially warm milk, which can protect the mucous membrane of the gastrointestinal tract and can effectively absorb the small amount of mercury that children accidentally ingest, because mercury can cause mercury poisoning in children, causing abdominal pain, nausea, vomiting, and even damage to liver and kidney functions. If a child swallows a large amount of mercury after biting a thermometer and it occurs within 6 hours, take the child to the emergency department for gastric lavage and vomiting as soon as possible to get rid of the mercury as soon as possible to prevent serious damage caused by prolonged accumulation. In addition, liver-protective and stomach-protective drugs can be applied, for example, montelukast can be given to children to protect the gastrointestinal mucosa. In addition, if there is liver function damage, apply medications such as Mennen to protect the liver in a timely manner.