甲醛对人体健康的危害有多大?从临床医学的角度来说，主要分为 3 个方面：
From the perspective of clinical medicine, it can be divided into three aspects
1. Irritant effect: formaldehyde is the original plasma toxic substance, which can combine with protein. Indoor formaldehyde exceeding the standard will stimulate eyes, nose and throat. When inhaled in high concentration, it is likely to cause poisoning.
2. Sensitization: direct contact with the skin with high concentration of formaldehyde is easy to produce allergic dermatitis, color spots, and even skin necrosis, leading to pneumonia and chronic bronchitis.
3. Mutagenicity: high concentration formaldehyde is also a genotoxic substance, which can cause damage to kidney, liver, pancreas, spleen and other organs, leading to mutation and cancer. Long term inhalation of formaldehyde in men will lead to low sperm survival rate; long term exposure to formaldehyde in pregnant women may lead to fetal malformation.