Long term exposure to low concentration of indoor formaldehyde steam heating will cause headache, dizziness, weakness and other diseases. 14% - 16% of construction workers reported overseas often suffer from digestive system obstruction, hyperactivity, hand shaking and visual impairment after exposure to indoor formaldehyde.
In the production workshop with formaldehyde content up to 0.3-0.6mg/m3, the construction workers with long-term work tasks have the following conditions: loss of appetite, weight loss, general fatigue, headache, dizziness, panic and insomnia. According to the report, indoor formaldehyde can also cause visual, tactile nerve and local sensory obstruction (feeling is the most common).
It is often confined to one side of the body or some parts of the body. There is a large amount of sweating on one side of the body (often because of the right side). The environmental temperature of the skin on the left and right sides of the body is different. The percentage of eye and soft palate irritant diseases and breast tension of the indoor formaldehyde construction workers who touch the low concentration for a long time is significantly higher than that of the control experiment, so the pulmonary function examination can be directly affected.
A small number of construction workers often have headache, nausea, headache, dizziness, general fatigue, drowsiness, anorexia, weight loss, eye vision loss, etc., but now there is no case discussion of poisoning. Some scientific research reminds that individuals or customers touching indoor methylaldehyde suffer from more malignant tumors in the nose or throat. IARC (1995) lists indoor formaldehyde as the whole person. Group 2A.