How to kill a little black bug that bites people (with pictures)

It is not clear from the photos that these insects should be fleas. Often feed on domestic animals and poultry such as cats and dogs (mostly domestic animals and dogs, especially after childbirth), lay eggs under body hair, and also lay eggs on fabrics and carpets. Fleas look for "prey" through heat sources. The newly hatched larvae crave blood. After finding the location of the host by identifying the direction in which the animals release heat, they will jump hard, which means that you are talking about moving very fast. Fleas have sharp mouthparts. After biting and sucking blood, little red dot, the size of a small rice ball, was bitten out. You can't catch it when it itches, and catching infectious bacteria is faster. You can use toilet water or wind oil to wipe it. Fleas are covered with hard shells, which can bear nearly 100 times their own weight, so they can't be crushed to death, and it is even harder to crush them when rubbed on the skin. The common method at home is to dry the underwear in the room in the sun with sundries, spray it without leaving a dead angle, and close the doors and windows for two hours after spraying (the longest time is when the ventilation is not pungent, it is not allowed to spray it on cold-blooded animals such as fish). Mothballs are also acceptable, but it's better to be pure. In a space full of mothballs, fleas will die in a few hours.