Formaldehyde causing sore throat is very common in clinical practice. Especially in the newly renovated houses, formaldehyde is seriously over the standard inside. When the patient stays in the space where formaldehyde is located for too long, it may cause dizziness, sore throat, dry throat, cough and other discomfort. In this case, patients are advised to get out of this environment as soon as possible, ventilate the house and try to breathe fresh air and oxygen. Patients are advised to go to an ENT clinic for an electronic laryngoscopy to determine the cause of the sore throat and the nature of the sore throat. To determine whether there is a more critical disease such as laryngeal edema, for this case, conventional treatment can be nebulization treatment, twice a day, morning and evening nebulization, adhere to nebulization for about a week. You can take throat tablets and oral Chinese medicine preparations for laryngitis for treatment. If the patient has severe local congestion in the throat and obvious infection, antibiotics can be applied for symptomatic treatment. It is recommended that patients drink more water, pay attention to a light diet, eat less spicy and stimulating, and reduce talking.