Are mosquito coils harmful to pregnant women?

Incense coils for flies typically have certain effects on pregnant women, with common symptoms including chest tightness, dizziness, and irregular vaginal bleeding. Their use is not recommended during pregnancy.

1. Chest tightness

Fly-repellent incense contains a large amount of additives and insecticides that emit an irritating odor. If pregnant women are exposed to such incense over a long period, the fumes may irritate the trachea and lead to chest tightness. Use should be stopped immediately. If symptoms are severe, prompt medical evaluation is necessary, and oxygen therapy may be administered under a doctor's guidance.

2. Dizziness

Pregnant women who remain for extended periods in rooms where fly-repellent incense is burned may experience dizziness due to the effect of its chemical additives on the nervous system. It is important to open windows promptly for ventilation, which can effectively relieve symptoms. If symptoms are severe, immediate medical attention is required. Pregnant women should avoid staying indoors while the incense is burning and should wait at least two hours after use—ensuring adequate ventilation—before re-entering the room.

3. Irregular vaginal bleeding

Frequent use of fly-repellent incense by pregnant women may result in inhalation of excessive harmful substances, potentially irritating the cervix and leading to complications such as irregular vaginal bleeding or uterine contractions. In such cases, doctors may prescribe medications to support pregnancy maintenance, such as progesterone soft capsules or dydrogesterone tablets.

In addition, it is best to avoid using fly-repellent incense altogether during pregnancy. To prevent flies and mosquitoes, physical barriers like mosquito nets are recommended instead.