Formaldehyde poisoning usually has some respiratory tract irritation, of course, if the skin contact with formaldehyde will also have some performance, will cause skin similar to the performance of allergic reactions. If the skin will appear red, some will have red papules similar to an acute urticaria, and some patients will feel a burning sensation in the skin, stinging performance. So it is recommended that if the skin has contact with formaldehyde should be immediately rinsed with water, with conditions can be used with soapy water or 2% sodium bicarbonate solution to be thoroughly cleaned, which is not easy to cause skin toxicity.