Generally spray insecticide ventilation half an hour can enter the house. Any insecticide will carry a certain degree of toxicity, if prolonged exposure will cause harm to the human nervous system, resulting in poisoning, prone to dizziness and headache, so ventilation for half an hour, waiting for insecticides to evaporate and dissipate, and then enter the house to prevent adverse effects. Spray insecticide should pay attention to no one in the case of spraying against the wall or ceiling, any items contaminated by the drug should be utilized to wipe with a wet towel, do not spray insecticide to food as well as tableware. The use of insecticides in the process to avoid the drug splashed in the eyes or skin, once into the eyes, to immediately flush with water, if any symptoms of discomfort, to immediately seek medical attention.