Children are very curious. When giving him a temperature test or playing with a thermometer, sometimes he will accidentally bite it off and swallow the broken glass and mercury (mercury). Parents are often very alarmed and scared at this point. In fact, as long as the broken glass is not stuck in the esophagus, the situation is not that serious. In order to promote the swallowed broken glass crumbs into the stomach as soon as possible, you can give the child a little food, and later the broken glass crumbs with the stool excretion will be fine. Can swallowed mercury cause mercury poisoning? Mercury metal is insoluble in gastric juice and has a high specific gravity, so it will enter the intestine and be excreted in the stool soon after it reaches the stomach. Besides, the amount of mercury in a thermometer is very small, and there are no reports of such poisoning. However, for safety reasons, after a child swallows mercury, he or she can be given some raw egg whites or milk to drink. The proteins in them can combine with metallic mercury and then stimulate the child’s throat to make him or her vomit so that the mercury is expelled from the body. If the metallic mercury stays in the body for too long, it can form toxic compounds that can be harmful to the body. Therefore, it is important to observe the child’s stool and other signs of discomfort, such as nausea, vomiting and other abnormal signs, so that early medical attention can be sought.