Formaldehyde can cause a sore throat. Formaldehyde is an organic chemical substance, which is a colorless and irritating gas that irritates the human eyes, nose and throat. High concentrations of formaldehyde will combine with human proteins and seriously irritate the respiratory tract, thus causing a series of symptoms such as edema and pain in the throat. If a patient experiences discomfort from receiving too much formaldehyde, he or she should immediately get out of the formaldehyde environment and try to avoid re-exposure. Patients can be treated symptomatically with anti-allergy, pain relief and anti-inflammatory drugs under the guidance of a professional doctor. If the pain in the throat is severe, anti-inflammatory drugs with appropriate amount of hormones can be infused for treatment. In addition, the patient’s diet should be light and easy to digest, such as egg custard, shrimp porridge, etc., in order to promote physical recovery. Daily should try to stay away from the formaldehyde pollution environment, decorated houses should be at least 3 months ventilation, should also be placed activated carbon bags, leaf wide mud materials, etc. to absorb formaldehyde, if excessive inhalation of formaldehyde, in addition to throat pain, its toxicity can also be on the human respiratory function, nervous system function, affect the body’s immune response, the cardiovascular system, endocrine system, digestive system, reproductive system, kidneys and other effects.