The cause of carbon monoxide poisoning is clear, i.e. the patient inhales too much of the products of incomplete combustion of carbon-containing substances. Incomplete combustion of carbon-containing substances can produce carbon monoxide, a colorless, tasteless gas, which enters the human body, and human hemoglobin to form carboxyhemoglobin, so that hemoglobin loses the oxygen-carrying capacity, and then appear in the whole body of the organization of the manifestations of oxygen deprivation. Common causes of carbon monoxide poisoning are: 1, the use of carbon stove heating in winter, where the carbon is not completely burned, coupled with tightly closed doors and windows, can lead to increased indoor carbon monoxide concentration, and then the phenomenon of poisoning; 2, domestic gas pipeline leakage or switch bad, old and dilapidated, which can make a large number of gas leakage, increasing the risk of carbon monoxide poisoning; 3, the use of gas water heaters, poor ventilation, etc., can also cause carbon monoxide poisoning. poisoning.