Active and correct on-site treatment after gas poisoning will greatly reduce the harm caused by the poisoning, how to determine gas poisoning? Once gas poisoning occurs, what should you do? I. How to determine gas poisoning? 1, there are coal burning, use of gas or charcoal fire for heating (burning charcoal hot pot for dinner) and other carbon monoxide environment. It is more important if there are multiple people in the same environment with similar symptoms. 2.Mild poisoning: headache, dizziness, ringing in the ears, nausea, vomiting, panic, and weakness around the body. 3.Moderate to severe poisoning: confusion, vomiting coffee-colored material, convulsions, coma, incontinence. 2.What should I do if I find gas poisoning? 1.Immediately get out of the poisoning environment: If the patient is awake, he or she should immediately get out of the poisoning environment. Patients with mild cases should be given fresh air, and those who have oxygen can be given oxygen in place. 2. On-site disposal: If you find an unconscious patient suspected of poisoning, you should call 120 or 999 emergency number, enter the scene of poisoning, open doors and windows for ventilation, change air, quickly grab the patient, place him/her in a fresh air place, take a flat position, unbutton the clothes, loosen the belt, clear respiratory secretions, keep the respiratory tract open, make the patient’s head tilted to the side to prevent suffocation, and pay attention to keeping warm. If respiration and heartbeat have stopped, perform external cardiac compressions and mouth-to-mouth artificial respiration immediately, absorb oxygen immediately if possible, and wait for emergency vehicles to send the patient to the hospital, preferably to a hospital with hyperbaric oxygen equipment. 3. Check the source of gas: Check the source of gas at the scene of poisoning, and first cut off the source of gas. (1) Check whether the flue is blocked, leaking, or poorly articulated if the coal stove is heated; whether the stove itself is broken and leaking; (2) Check whether the connection pipe is aging and leaking if the pipeline gas is used, and whether the connection is detached; (3) Check carefully the water heater and the connection pipe if the gas water heater is used for bathing; (4) Check whether the indoor air hopper is placed according to the installation and whether the stove is improperly installed. (4) Remove the hidden danger of poisoning and install carbon monoxide alarms to prevent similar incidents from happening again.