When Ms. Liu woke up in the morning, her 1-year-old 7-month-old child, Mingming, had a cough and was a little hot when she touched his brain, she rushed to find the mercury thermometer she had stockpiled during the SARS period and intended to measure his temperature. She was afraid that the baby would not adapt to the cool thermometer, so she first warmed the thermometer with her palm, then shook off the table, carefully inserted the thermometer under Ming’s armpit, and whispered to him not to move, thinking that it would take about 5 minutes to take a temperature, she picked up the urinal and went out, but turned back and found that the child had put the thermometer in his mouth. The “tail” is gone, and the white mercury inside is also missing. Ms. Liu hurriedly let Ming Ming open his mouth, but the mercury has long disappeared, only the “mercury head” remains. Now Ms. Liu panicked, who knows that mercury is toxic, so immediately took the child to the hospital. In the hospital doctors told her that small children chewed thermometer to first check whether the child’s mouth was glass lacerations, Ming’s mouth was not pierced by glass, the hospital next gave an examination and found that his gastrointestinal tract is scattered with some gritty foreign matter, which is a small amount of metallic mercury, as mercury through the complete gastrointestinal tract is basically not absorbed, so parents should not panic. After checking that there is no damage to the oral mucosa give the child some food containing fiber to eat, such as leeks, celery, etc.. The mercury will be excreted with the stool in one to two days. It should be noted that mercury can evaporate into a gas at room temperature and can be easily exhaled into the respiratory tract, but a small amount of inhalation does not cause poisoning. Immediately open the windows to reduce the concentration of mercury vapor in the room, and promptly clean up the mercury scattered on the ground.