Mosquitoes have a strong sense of smell. When humans exhale carbon dioxide and other smells, these smells will spread in the air. These smells are like the bell for dinner, telling mosquitoes that a good meal is just around the corner. When a mosquito tracks a target, it always twists and turns with the smell of people's breath until it touches the target and then falls on the skin, patiently looking for a "breakthrough". Finally, directly insert the "needle tube" into the skin to suck blood for 8- 10 seconds.
Most cosmetics contain stearic acid (a fatty acid), so people who wear makeup are more popular with mosquitoes than those who don't wear makeup. As for a person's cholesterol level, it will not affect the judgment of mosquitoes unless there is enough cholesterol stored near the epidermis. Of course, there are also some odors that mosquitoes hate, such as bay leaves, citronella oil, citronella, garlic and geraniol.
Another study shows that pregnant women are 1 times more likely to be bitten by mosquitoes than non-pregnant women. Researchers believe that women's breath during pregnancy contains many different chemicals, which makes them the target of Anopheles mosquitoes. In addition, pregnant women have higher body temperature and sweat more, which is a good base for skin bacteria to breed. These two reasons make pregnant women more vulnerable to mosquito bites than other women.