Can natural gas leakage cause poisoning?
Nov 24, 2025
Source: Cainiu Health
Dr. Ren Yi
Introduction
In a confined space with a large natural gas leak, oxygen in the air may be significantly displaced, leading to oxygen deficiency. This can cause symptoms such as dizziness, weakness, and difficulty breathing, and in severe cases, may result in unconsciousness. If natural gas does not burn completely, it can produce carbon monoxide, a gas that strongly binds to hemoglobin and impairs oxygen transport. Severe carbon monoxide poisoning can be life-threatening.
Under normal circumstances, natural gas leaks may cause poisoning, but the risk of poisoning is closely related to the concentration of the leak and the ventilation conditions of the environment. If any abnormalities occur, it is recommended to seek medical attention promptly. The specific analysis is as follows:
If a large amount of natural gas leaks in an enclosed space, oxygen in the air may be significantly displaced, leading to hypoxia. Symptoms such as dizziness, fatigue, and difficulty breathing may occur, and in severe cases, unconsciousness may result. If natural gas does not burn completely, carbon monoxide can be produced. This gas binds strongly to hemoglobin, impairing oxygen transport and causing poisoning symptoms such as headache, nausea, and vomiting. Severe poisoning can be life-threatening.
If indoor ventilation is good, a small natural gas leak will quickly disperse, oxygen levels in the air remain largely unchanged, and no carbon monoxide is generated, then the amount of natural gas inhaled by the body is limited and generally will not lead to poisoning symptoms.
When using natural gas daily, ensure adequate ventilation, regularly inspect equipment, and install gas alarms. In case of a leak, immediately close the valve, open windows for ventilation, avoid using open flames or electrical appliances, evacuate quickly, and contact professionals for assistance.
