Internal pollution is due to the presence of a variety of volatile organic compounds in the indoor air and the phenomenon of pollution of the indoor environment, especially indoor decoration materials and furniture caused by formaldehyde pollution of the indoor environment, the harm is great.

The release of decorative pollutants up to 3-15 years, their harm includes:

1) cause abnormalities in the human immune function, liver damage, liver damage and nerve center affected;

2) on the eyes, nose, throat, upper respiratory tract and skin damage;

3) cause chronic health damage, reduce human life expectancy;

4) Serious can cause cancer, fetal malformation, women's infertility, etc.;

5) on the normal growth and development of children have a great impact on children, can lead to leukemia, memory loss, growth retardation, etc.;

6) on the female appearance of the skin, but also the infringement of the skin, is not to mention. Because formaldehyde has a strong stimulating effect on the skin mucous membrane, after exposure to the skin will appear wrinkled, sweat secretion is reduced and other symptoms. Decreased sweat secretion will hinder the pores of the dirty and human metabolism.