Wormwood is a kind of plant with a special smell, so the insect repellent effect is quite good. Moreover, Xin Wen can purify the air, has the effect of aromatic resuscitation, can make people clear their heads, improve their hearing and vision, and even prevent colds.

The effective component of modern mosquito-repellent incense is pyrethrin, which has the function of repelling mosquitoes and killing mosquitoes. After the mosquito-repellent incense is ignited, the pyrethroids in the mosquito-repellent incense volatilize with the smoke and spread in the indoor air, paralyzing the mosquitoes' nerves, so the mosquitoes either fall to the ground and die, or flee in all directions, thus playing the role of repelling mosquitoes.