Inhalation of excessive formaldehyde can lead to the appearance of headache, and also dizziness, nausea, chest tightness, vomiting and other symptoms, as well as irritating watery eyes, sore throat, palpitations, loss of appetite, fatigue, insomnia and other symptoms. Because formaldehyde has the effect of seriously causing genetic mutation, excessive formaldehyde in the environment and chronic absorption by the body can lead to the development of blood system diseases such as leukemia and aplastic anemia, as well as other system tumors such as nasopharyngeal cancer. Formaldehyde has an irritating effect, mainly in the form of irritation of the mucous membrane of the skin, which can cause respiratory difficulties, leading to pneumonia, laryngeal edema, and even cause respiratory failure, pulmonary edema, etc.. It can also lead to skin allergies and elevated transaminases, so it is important to focus on the formaldehyde content in the environment to meet the standards.