Formaldehyde is known to cause rhinitis, and the concentration of formaldehyde in the air can cause different degrees of harm to human health if it exceeds the normal standards set by the state. The main symptoms of long-term exposure to formaldehyde are sneezing, nose blockage, tears, coughing, allergic rhinitis, conjunctivitis and bronchitis, bronchitis, serious allergic asthma, and even allergic purpura if a large amount of exposure, with serious consequences. Formaldehyde is mainly metabolized by the liver and excreted by the kidneys. If the formaldehyde in the body exceeds the detoxification capacity of the liver, it can damage the liver. If you live in the environment of formaldehyde decoration materials, there is a risk of acute toxic hepatitis, if work and life can not avoid long-term exposure to formaldehyde, pay attention to occupational protection, often open windows and ventilation, drink more water, regular monitoring, pay attention to the nose and eyes and airways and blood indicators to avoid occupational hazards.