Bedbugs can and do bite cats, but it’s uncommon. These insects strongly prefer human hosts because our exposed skin gives them easy access to a blood meal. A cat’s fur creates a physical barrier that makes feeding difficult, so bedbugs will almost always choose a nearby person over a pet. Still, in a heavy infestation or when humans aren’t available, cats become targets.
Why Bedbugs Prefer Humans Over Cats
Bedbugs are blood-feeding parasites that have evolved alongside humans for thousands of years. Their flat bodies are designed to hide in mattress seams, headboard crevices, and baseboards, then crawl out at night to feed on sleeping people. Bare human skin is the ideal feeding surface for their short, piercing mouthparts.
A cat’s dense fur coat makes this process significantly harder. Bedbugs have to navigate through hair to reach the skin, and they’re not equipped for that the way fleas and ticks are. Fleas have laterally compressed bodies built to move through fur, and ticks have barbed mouthparts that anchor into skin. Bedbugs have neither adaptation. When a bedbug does bite a cat, it typically targets areas with thinner fur: the belly, inner legs, or ears.
One important distinction: bedbugs don’t live on cats. Unlike fleas, which spend their lives on a host animal, bedbugs hide in the environment and only visit a host long enough to feed, usually 5 to 10 minutes. Your cat’s body is not a habitat for them. However, a cat’s fur or collar can briefly carry a bedbug from one room to another, which is how pets sometimes help spread an infestation within a home.
Signs Your Cat Has Been Bitten
Bedbug bites on cats look similar to other insect bites, which makes them tricky to identify. Small red bumps or welts on areas of thinner fur are the most visible sign. You’re more likely to notice behavioral changes first: excessive scratching, licking, or grooming focused on one area. Some cats develop mild allergic reactions that cause swelling around the bite site.
The bites themselves aren’t dangerous in most cases. The real risk comes from secondary complications. Intense itching can drive a cat to scratch or overgroom a spot until the skin breaks, opening the door to bacterial skin infections. Cats with flea allergy dermatitis or sensitive skin may react more strongly than others. If you notice raw patches, hair loss in a localized area, or signs of infection like warmth and discharge around a bite, that warrants a vet visit.
Do Bedbugs Spread Diseases to Cats?
No. Despite feeding on blood, bedbugs have never been proven to transmit infectious diseases to any host, whether human or animal. Researchers at Ohio State University have noted that while bedbugs theoretically could act as disease carriers given their blood-feeding habits, no published study has ever demonstrated that they actually do. This holds true for cats as well. The health concern with bedbug bites is limited to the bites themselves: itching, irritation, possible allergic reactions, and secondary infections from scratching.
A Critical Safety Warning About Bedbug Pesticides
If you’re dealing with a bedbug problem in your home, this is the most important thing to know as a cat owner: many common bedbug insecticides are extremely toxic to cats. Pyrethrins and pyrethroids, the most widely used class of chemicals in bedbug sprays and foggers, pose a serious poisoning risk. Cats are significantly more sensitive to these compounds than dogs or humans because they lack certain liver enzymes needed to break them down.
Symptoms of pyrethroid poisoning in cats include drooling, vomiting, tremors, seizures, difficulty breathing, and in severe cases, death. There is no specific antidote. Many over-the-counter bedbug sprays, “bug bombs,” and even some bedbug-killing powders contain pyrethroids, and the residue left on floors, furniture, and bedding can poison a cat that walks through a treated area and then grooms its paws.
If you’re treating your home for bedbugs, remove your cat from the space before applying any product and read labels carefully. Better yet, use heat treatment or hire a professional pest control service and let them know you have cats. Never apply a dog-specific flea or tick product to a cat either, as many contain permethrin at concentrations that are safe for dogs but lethal to cats.
How to Protect Your Cat’s Belongings
Cat beds, blankets, soft toys, and fabric carriers can all harbor bedbugs in their seams and folds. Bedbugs can survive without a blood meal for 20 to 400 days depending on temperature and humidity, with adults lasting over 400 days in cool conditions. Simply leaving an item unused for a few weeks won’t solve the problem.
Heat is the most effective and pet-safe way to kill bedbugs on washable items. Bedbugs die within 20 minutes at 118°F, and eggs require 90 minutes at that same temperature for complete elimination. The simplest approach: run your cat’s bedding through a household dryer set on high for at least 30 minutes. A loosely filled dryer on the high setting kills all life stages, including eggs, within that time frame. For items that can’t go in the dryer, portable heating units designed for bedbug treatment can reach the necessary temperatures, though they take several hours to work.
Hard items like plastic food bowls or litter boxes can be wiped down with hot soapy water. Vacuum cat trees and carpeted perches thoroughly, paying attention to crevices, and dispose of the vacuum bag in a sealed plastic bag outside your home.
Telling Bedbug Bites Apart From Flea Bites
Since bedbug bites on cats are rare and look generic, it’s worth figuring out whether fleas are the actual culprit. Fleas are far more likely to bite cats and will live on your cat’s body between meals. Check your cat’s fur with a fine-toothed comb, especially around the neck and base of the tail. Tiny black specks that turn reddish-brown when wet are flea droppings, a definitive sign.
Bedbugs, by contrast, leave their evidence in the environment rather than on your pet. Look for small rust-colored stains on bedding, tiny dark spots (fecal matter) along mattress seams or in crevice corners, and shed skins. If you find these signs in areas where your cat sleeps, bedbugs are likely biting your cat along with everyone else in the household. Adult bedbugs are visible to the naked eye, roughly the size and shape of an apple seed, and reddish-brown in color.
If your cat is scratching but you can’t find fleas on the animal or bedbug evidence in the environment, other causes like allergies, mites, or dry skin are more probable than bedbug bites.