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Are fleas harmful to humans?
- By Leigha
-
- May 22, 2026
Yes, fleas can be harmful to humans but they're usually more dangerous to pets than people. Fleas are tiny parasitic insects that will survive by feeding on you or your pet's blood. When they bite humans, they often cause itching, redness, and small swollen bumps, usually around the ankles or legs. You might develop allergic reactions to flea bites, leading to intense itching or skin irritation. Click here to see human flea bites!
Beyond lots of scratching, fleas can sometimes spread diseases. They can carry bacteria such as Bartonella, which may cause cat scratch disease, and they can also spread murine typhus in some regions. Alongside this, fleas often cause worms - Tapeworm larvae can be spread if accidentally swallowed, especially by children or pets.
Flea infestations can also affect mental well-being because constant itching and repeated bites may disturb sleep and create stress. Homes with pets are more likely to experience flea problems because fleas commonly live on cats and dogs before spreading into carpets, bedding, and furniture. You can have still have fleas in a house with no pets - Find out more here!
To reduce risks, it is important to treat pets regularly with vet-approved flea treatment like Itch Flea Treatment for Cats & Dogs. You should also regularly clean living spaces thoroughly by vacuuming your home often and washing pet bedding in hot water.
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