Chronic diseases include chronic fatigue syndrome, sick building syndrome, sick house syndrome, Persian Gulf Soldier syndrome, chemical sensitivity, instinctive environmental tolerance. Representative symptoms of sick building syndrome include symptoms of eye / throat / nose irritation, mucous membrane drying, erythema on the skin, urticaria, eczema, urticaria, tiredness, headaches, frequent occurrence of respiratory tract infections, susceptible to colds, breath It is tied up, vigilant, dizzy, nausea, vomiting, hypersensitivity, and shortage of ventilation accounts for about 30% as a cause.
◆ Chemical hypersensitivity
Chemical hypersensitivity is an abnormal hypersensitivity reaction caused by a trace amount of a chemical substance after a long period of exposure to a large amount or a trace amount of a chemical substance. Its symptoms are fatigue, diarrhea, constipation, anxiety, muscle pain, headache, and it is very similar to the symptoms of sick building syndrome.
In the carcinogenicity assessment by the International Cancer Institute, formaldehyde is a potential substance, and it is said to be a substance that has not been sufficiently proven for toluene and xylene. The US Environmental Protection Agency reports that if you keep sucking formaldehyde at a concentration of 0.10 ppm for about 18 hours a day for 5 years, there is a possibility that one in ten thousand people will get cancer.