If the thermometer breaks, you need to open the window to ventilate the room, use a smooth piece of paper to collect the scattered mercury beads in a sealed container, and sprinkle some sulfur powder. 1. The main component of thermometer is mercury, which is mainly absorbed through the skin and respiratory tract to cause toxic reactions. After the thermometer is broken, you need to open the window to keep the air circulating to prevent untimely ventilation and mercury poisoning. 2. Use smooth paper to collect the scattered mercury beads in sealed containers, such as glass bottles, and add a little water in the bottle to prevent mercury volatilization, and remember not to touch the mercury beads directly with your hands. 3. For the fragments that are broken more seriously and cannot be collected, sulfur powder can be scattered to react with mercury and reduce the toxicity of mercury. There are many ways to deal with the thermometer after broken, remember to keep good ventilation, fast collection. Promptly seek medical attention after discomfort occurs to rule out mercury poisoning.