Can using mosquito-repellent incense in a closed space cause poisoning?

Burning mosquito coils in a closed space may lead to poisoning.

Mosquito coils contain certain organophosphates, carbamates, and pyrethroids. When ignited, they release harmful substances such as formaldehyde, acetaldehyde, benzene, polycyclic aromatic hydrocarbons, and particulate matter with a diameter smaller than 2.5 micrometers. If a mosquito coil is burned in an enclosed environment with poor air circulation, toxins in the air may gradually accumulate. Prolonged exposure to such an environment may result in poisoning, causing symptoms like nausea, vomiting, dizziness, and fatigue. It may also lead to eye dryness, tearing, and other abnormalities, or even trigger allergic conditions such as allergic asthma and allergic rhinitis, adversely affecting health.

When using mosquito coils, avoid doing so in enclosed spaces. If discomfort occurs after lighting a mosquito coil, immediately open windows for ventilation, move to a well-ventilated area, and take deep breaths to help alleviate symptoms.