Can using mosquito coils in a closed room cause poisoning?

Burning mosquito coils in a closed room may lead to poisoning. When burned or vaporized, mosquito coils release chemicals such as pyrethroid insecticides and combustion enhancers. In enclosed spaces, these substances cannot disperse effectively, leading to gradually increasing concentrations that can harm the human body. If symptoms such as dizziness, nausea, or difficulty breathing occur, medical attention is recommended immediately.

Pyrethroids are the primary insecticidal ingredients in mosquito coils. Under normal use, they have relatively low toxicity to humans. However, when their concentration exceeds safe levels in enclosed environments, they can irritate the respiratory mucosa, causing coughing and sore throat, and may also affect the nervous system, resulting in headaches, fatigue, and numbness in limbs.

Combustion of auxiliary components such as ignition promoters and binders can generate harmful substances like carbon monoxide and formaldehyde. In closed rooms, accumulation of these pollutants increases bodily stress. Elderly individuals, children, pregnant women, and people with respiratory conditions face higher risks of poisoning and may experience more severe adverse reactions.

When using mosquito coils, ensure adequate indoor ventilation and avoid using them overnight in tightly sealed spaces. Place them away from beds and flammable materials. Choose low-toxicity products from reputable manufacturers. For infants, young children, and pregnant women, physical mosquito protection methods such as mosquito nets are strongly recommended.