Formaldehyde exceeds the standard for children’s harm is may cause allergic symptoms, may also have an impact on the respiratory system, long-term inhalation of formaldehyde will also make the digestive system abnormal. 1. Allergy: formaldehyde is a toxic gas, children in the formaldehyde exceeds the limit of the environment, easy to appear allergic to the situation, the skin may appear red rash, there will be obvious itching, tingling and other adverse symptoms. Eyes and nose will also appear discomfort, will lead to increased secretions, redness and swelling and other discomfort. 2. Respiratory effects: formaldehyde exceeds the standard for children’s harm, but also includes the impact on the respiratory system. Inhalation of formaldehyde this kind of toxic gas, will cause irritation of the respiratory tract, there will be irritating coughing, may also induce asthma, bronchitis and a series of diseases appear, and will even cause damage to the lungs. 3. Digestive system abnormalities: due to the children’s body immunity is poor, the functions have not been developed, formaldehyde exceeds the standard may also cause digestive system abnormalities, nausea, vomiting and other undesirable symptoms can easily occur, will make the children appear loss of appetite. In addition, children in the formaldehyde over the long term in the environment, may also lead to leukemia, in order to prevent such a situation, be sure to carry out regular formaldehyde testing, to ensure the safety of the surrounding environment. The appearance of such adverse symptoms, you need to consult a doctor in time for examination, according to the results of the examination, under the guidance of the doctor for treatment, to avoid delaying the condition.