Formaldehyde is a gas that is harmful to the human body. In daily life, formaldehyde exceeding the standard is more common in newly renovated houses and new furniture. Formaldehyde is very harmful to the body. The main hazards and clinical symptoms are as follows:

1. Respiratory system. After inhaling air containing formaldehyde, you will feel poor breathing, coughing, and chest tightness. Long-term exposure may cause chronic pneumonia and decreased lung function;

2. The eyes and conjunctiva of the eyes are more sensitive to formaldehyde, and those who have been exposed for a long time will experience symptoms such as dry eyes, tearing, and photophobia;

3. Immune system, long-term inhalation of formaldehyde can damage the immune system, resulting in impaired immunity, and patients are prone to repeated colds, fever and other symptoms, and even lead to the occurrence of tumors, especially leukemia, lymphoma, etc.;

4. Nervous system, inhalation of formaldehyde can cause damage to the nervous system, and patients may experience dizziness, fatigue, insomnia, drowsiness and other symptoms.