Cockroaches are common pests in homes, schools, and workplaces. But while they may be common, they are far from harmless. Cockroaches can spread dangerous bacteria such as Salmonella and trigger allergies and asthma in sensitive individuals.

Can Cockroaches Bite You?

Unlike pests such as spiders or ticks, cockroaches don’t feed on human blood and rarely bite. In severe infestations, bites are possible but extremely unlikely.

The real health risks come from:

  • Their skin sheddings, saliva, droppings, and eggs that trigger allergies.

  • The bacteria they carry, which can contaminate food and surfaces.

How Cockroaches Can Make You Sick

Cockroaches carry germs on their bodies and leave them behind as they move. When these bacteria reach food, utensils, or kitchen surfaces, they can cause foodborne illness.

Some of the most common bacteria include:

  • Salmonella – Causes diarrhea, cramps, nausea, and vomiting.

  • Shigella – Leads to diarrhea, fever, and stomach cramps.

  • Staphylococcus aureus – Produces toxins that cause food poisoning.

  • E. coli – Certain strains cause severe diarrhea, fever, and stomach cramps.

Cockroaches and Allergies

Proteins in cockroach bodies, saliva, and droppings can trigger allergic reactions. Even dead cockroaches can release allergens that remain in the air and on surfaces.

Symptoms of cockroach allergy include:

  • Skin rash and itching

  • Sneezing, runny nose, congestion

  • Watery or itchy eyes

  • Coughing and postnasal drip

For people with asthma, cockroach allergens can trigger severe breathing difficulties.

How To Reduce Cockroach Allergens

You can limit exposure to cockroach allergens by:

  • Running a humidifier to keep humidity at 30–50%

  • Using anti-allergen covers on bedding

  • Washing sheets weekly in hot water

  • Removing carpets, rugs, and curtains that trap allergens

How To Keep Cockroaches Away

Cockroaches thrive in warm, damp places with food and hiding spots. To prevent infestations:

  • Store food in sealed containers

  • Wipe counters and clean up crumbs quickly

  • Wash dirty dishes promptly

  • Fix leaks and reduce moisture with dehumidifiers

  • Declutter, especially cardboard boxes and newspapers

  • Seal gaps around doors, windows, and pipes

What If You Already Have Cockroaches?

If you spot cockroaches, act quickly:

  • Use boric acid powder, bait stations, and sticky traps

  • Keep treatments away from children and pets

  • Call a professional exterminator for severe infestations

A Quick Review

Cockroaches don’t usually bite, but they are dangerous because they spread bacteria and trigger allergies and asthma. Keeping food sealed, reducing moisture, and sealing entry points are key to prevention. If you already have them, act quickly with traps or professional pest control.