Formaldehyde exceeding the standard will cause strong cough, formaldehyde has a very strong irritation, when the human body in the inhalation of high concentration of formaldehyde, it will be severely irritated, edema. In addition, the eyes will also experience various discomforts, such as tingling, and there may be a headache or bronchial asthma, which is why formaldehyde exceeds the standard, will lead to coughing for the main reason. In severe poisoning, even acute bronchopneumonia, pulmonary edema, and upper respiratory tract irritation can occur. When formaldehyde is inhaled, it should be observed for at least 24-48 hours. In order to avoid serious complications, exposure to high concentrations of formaldehyde, patients should be given 0.1% diluted ammonia inhalation, early enough for short-term use of glucocorticosteroids, as far as possible to keep the airway open, isolation and recovery, in order to prevent infection and prevent complications.