Formaldehyde damage to the human body is mainly irritating to the skin and mucous membranes, and has a certain degree of carcinogenicity. If the formaldehyde in the air reaches a certain concentration, it will cause some stimulation to the skin as well as mucous membrane parts, resulting in itching skin, itchy eyes, hoarse voice, runny nose, throat discomfort and other symptoms, especially for pregnant women and children and other special groups of people’s body is more harmful. In addition, formaldehyde has a certain degree of carcinogenicity, easy to cause genetic mutation, thereby increasing the incidence of malignant tumors. Normally, we should try to avoid long-term in the formaldehyde exceeds the standard environment, especially just renovated new home, you should first open the window to air dry for a period of time before moving in, can reduce formaldehyde.