Do Cockroaches Bite? The Risks of Cockroach Bites and How to Handle Them

Although cockroaches have chewing mouthparts and are theoretically capable of biting, they very rarely attack people on their own in daily life. Cockroaches are naturally afraid of light and of people, and they mainly come out at night; when they encounter a person, they quickly run away, and under normal circumstances they do not treat people as an object of attack or feeding. Only when there are very many cockroaches in the environment and food is severely scarce might an individual cockroach gnaw on a person's skin while they are asleep, most often on exposed areas such as the fingers, the corners of the mouth, and the eyelids. The bitten area generally shows local redness, swelling and itching, and the symptoms are usually mild, but people with sensitive skin may develop a more noticeable allergic reaction.

Compared with biting, the greater threat cockroaches pose to people actually lies in contaminating the environment. They often move about in dirty places such as sewers and garbage piles, and their body surfaces and excrement can easily carry pathogens; after crawling over food or tableware they may cause contamination, and their shed skins and secretions may also trigger allergic or respiratory discomfort in some people. So when cockroaches are found in the home, the focus should be on preventing their spread and their contamination of food.

If you are bitten by a cockroach, first wash the wound with soapy water, then do simple disinfection, and try to avoid scratching during this time. If the area of redness and swelling expands, pus appears, or there is general malaise, seek medical attention promptly and do not casually apply medication on your own.

To reduce the risk of being bitten and of contamination, the key is preventing and eliminating cockroaches. Normally, store food properly, clean up garbage and standing water promptly, and seal up hiding spots such as wall cracks and cabinet seams; when signs of cockroaches are found, deal with them promptly using methods such as bait and sticky traps, and keep the environment dry and tidy, so as to reduce cockroach breeding at the root.