We all realize that mercury has some toxicity, so we are very worried about the harm after the mercury thermometer broken in our daily life. Metallic mercury is insoluble in gastrointestinal fluid, a small amount of mercury can cause salivation and diarrhea, but not fatal poisoning, so the thermometer in the mouth or anus, in the process of measuring temperature if broken, a small amount of mercury is not toxic, can be assured. Adults can generally cause symptoms of poisoning only when about 10 ml. Mercury vapor can overflow at room temperature, and the higher the temperature the larger the vapor. Mercury vapor is highly toxic and can be inhaled through the respiratory tract, or mercury salt dust can cause acute poisoning, and there are also patients who died from poisoning due to inhaling fumigated mercury agent. So in daily life if you encounter a broken thermometer, or mercury overflowing from the mercury column sphygmomanometer used, in that case you should collect the overflowing mercury with dry paper or airtight container, seal it airtight and discard it, don’t expose it in room temperature for a long time to avoid mercury vapor poisoning.