Poisoning from broken mercury thermometers may result in skin symptoms, respiratory symptoms, neurological symptoms and so on. 1. Skin symptoms: mainly when the skin comes into contact with the heavy metal mercury in mercury, some stress reactions may occur, such as localized skin ulcers, generalized erythema, pimples and so on. 2. Respiratory symptoms: metallic mercury is absorbed very little in the gastrointestinal tract and does not cause poisoning, but mainly enters the human body in the form of vapor through the respiratory tract, which often triggers symptoms such as coughing, coughing up phlegm, chest tightness, and may even lead to respiratory distress and cyanosis. 3. Nervous system symptoms: mercury mercury has a certain volatility, if the mercury thermometer after breaking, if the environment temperature is too high so that the mercury volatilization, it is likely to lead to dizziness, headache and other symptoms. After the mercury thermometer broken, if there are obvious symptoms of poisoning, you should promptly go to the hospital, and need to break the mercury thermometer to clean up, while opening the window to ventilate.