Insecticides can be poisonous if you smell them. Insecticides basically contain organophosphorus, which can cause damage to the human body through the respiratory tract. Organic phosphorus is toxic to the human nervous system, smelling too much may cause poisoning. It is very easy to irritate the respiratory tract when you first come into contact with insecticides, and symptoms such as runny nose, sneezing, coughing, etc. can occur, and can even cause nerve paralysis, dizziness, headache, sensory abnormalities and other neurological symptoms, and may also lead to blurred vision. If exposure to insecticides for a longer period of time, mild poisoning may occur, mainly manifested as headache, dizziness, vomiting and other symptoms. In severe cases, severe poisoning may occur, resulting in coma, convulsions and even life-threatening symptoms. If exposed to insecticides, you need to let the patient leave the environment containing insecticides and send the patient to the hospital in time for rescue treatment to avoid more serious consequences.