Cockroach bites may lead to various infectious disease infections, allergies and other hazards. 1. Infectious disease infection: cockroaches have been proved to carry Mycobacterium leprae, Mycobacterium plague, Shigella dysentery bacillus and other bacteria, which may lead to leprosy, plague, dysentery and other serious infectious diseases after being bitten by cockroaches. At the same time, cockroaches may also carry eggs of roundworms, duodenal hookworms, pinworms, whipworms and other helminths, leading to parasitic infections. 2. Allergy: cockroaches have chewing mouthparts, and in the process of gnawing tissues, they also secrete feces and other substances, which, after contacting the human body, will lead to tissue edema, itchiness, rashes and other discomforts, and in severe cases, will cause respiratory difficulties and other serious complications. It is recommended to go to the hospital in time when the above mentioned diseases occur; in daily life, it is necessary to pay attention to the hygiene and cleanliness of the living environment, and if necessary, anti-cockroach drugs can be used for prevention and control.