In case of a newly renovated home or purchase of new furniture, the formaldehyde in the air may exceed the standard and a subtle odor will be smelled when the formaldehyde content exceeds 0.1mg/m³. If the odor is detected, it may lead to mild formaldehyde poisoning. Common symptoms are nausea, suffocation, dizziness, dizziness, skin irritation, which can be itching, redness or rash. Some patients also show respiratory symptoms such as sneezing, coughing, sore throat, and poor immunity. If you feel uncomfortable in the throat, it depends on whether there is a history of formaldehyde exposure, such as exposure to formaldehyde at work or a history of formaldehyde exposure in newly decorated houses or newly changed furniture. If there is no history of formaldehyde exposure and throat discomfort, it depends on whether there is something else that causes allergies or colds, etc.