African fruit flies not only invade all kinds of fruits, but also parasitize under the epidermis of people or animals. The way is that at night, fruit flies lay their eggs in the cracks of clothes or bedding that people are drying outside the house. After contact, the eggs hatch into larvae and burrow under the epidermis of humans or animals. Then, the fruit fly directly contacts the human body to lay eggs (it can lay eggs with a small wound). Later, the larvae grow up day by day, and the skin is red, swollen, itchy and painful, and the worms are squeezed out by hand.