If my pet doesn't have fleas anymore, why am I still getting bitten?

Because the flea life cycle doesn't end when the fleas on your pet are gone. Roughly 95% of a flea population at any given time exists as eggs, larvae, and pupae hidden in carpet, bedding, baseboards, and shaded yard areas — not as adults on the animal. Those hidden stages keep developing and emerging as new adults for weeks after the pet is treated, and those new adults will bite any available host, including people, if a pet isn't around or is now protected. Continued bites usually mean the environmental side of the infestation hasn't been fully addressed yet.

Can fleas live on a person's body the way they live on a pet?

Not really. Cat fleas — the species responsible for the overwhelming majority of household infestations — are adapted to live in fur, where they can move around, lay eggs, and stay hidden from grooming. Human skin and hair don't offer that same cover, so fleas generally bite a person and move on rather than taking up residence. This is different from lice, which are adapted specifically to live on human hosts. That said, in a heavily infested home, a person can be bitten repeatedly throughout the day even without fleas living on them continuously.

Is it safe to have fleas in a house with young children?

It's not an emergency, but it's worth addressing promptly. Young children are at somewhat higher risk of a couple of flea-related issues: they're more likely to be bitten because they're close to floor level, and they're more likely to accidentally swallow an infected flea while playing, which is the route by which tapeworm spreads to humans. Watch for rice-like segments near a child's anus or in stool as a tapeworm sign, and see a pediatrician if you notice that or if bites look infected. Treating the flea source promptly reduces all of these risks.

Do fleas spread any disease directly from a pet's bite to a person?

The disease risk isn't from a pet biting a person — pets don't transmit flea-borne illness by biting people. The risk pathway runs through the flea itself: a flea bites an infected pet or wildlife host, and if that flea (or its feces) then contacts a person, certain pathogens can transfer. In New Hampshire, the realistic pathways are tapeworm from accidentally swallowing an infected flea and cat-scratch disease from a scratch or bite contaminated with flea feces from an infected cat — both uncommon, and both prevented by consistent flea control rather than by anything related to the pet's behavior.

Daniel Brady · NH-Licensed Pesticide Applicator · License #782664

|Reviewed by Daniel Brady

Can Fleas Spread From Pets to Humans?

Yes

Yes. The cat flea (Ctenocephalides felis) is the flea most people encounter, and while it prefers animal hosts, it will bite humans — especially when pets are treated or removed and hungry fleas seek a new blood meal. Fleas don't live on people the way they live on furry pets, but they bite, and they can transmit certain germs and parasites in the process. In New Hampshire the realistic risk is itchy bites and, less commonly, tapeworm (mainly in young children) or cat-scratch disease; the classic textbook flea diseases like murine typhus and plague are essentially not NH concerns.

At a Glance

Short answer: Yes — fleas readily bite people and can spread a few germs and parasites, though serious flea-borne disease is rare in New Hampshire.
This is about: Fleas
What you can see: only ~5% — the rest is hidden

The honest answer

The short of it

The verdict on fleas

Yes

Yes — fleas readily bite people and can spread a few germs and parasites, though serious flea-borne disease is rare in New Hampshire.

The part you can't see

The flea iceberg

What you notice on a pet is the tip. The problem that actually reinfests you is the mass below the waterline — eggs, larvae, and pupae in the environment.

The whole flea problem, to scale

You see ~5%. The other ~95% is hidden.

The tip you see

~5% adults

waterline

~95% hidden below

Eggs~50%

Larvae~35%

Pupae~10%

Where the hidden mass actually is

AdultsVisible
On the pet, but readily hopping onto people nearby — the stage that actually bites both pet and human
Eggs
Falling from the pet into carpet and furniture across shared living space, seeding bites for everyone in the home
Larvae
Maturing in carpet and upholstery fibers in the rooms people and pets share most
Pupae
Cocooned and dormant in high-traffic areas — emerging to bite whichever warm-blooded host passes first, pet or person

Why it matters

Fleas move from a pet's coat into carpets, bedding, and furniture, where the eggs, larvae, and pupae they leave behind — about 95% of the population — keep producing new adults that bite both pets and people. That's why bites on humans often continue even after a pet is treated: the environment still holds the reservoir.

Calibrated from: CDC flea life cycle; CAPC Fleas guideline; University of Georgia Extension

The honest read

What to do about it

Where to turn

For people and pets

Signs to watch

itchy bite clusters on a person's lower legs or ankles
excessive scratching, licking, or grooming in a pet
visible fleas or flea dirt in a pet's fur
in children, rice-like tapeworm segments near the anus or in stool

Do not

don't assume treating human bites solves the problem — treat the pet, home, and yard together
don't put off starting pet flea prevention once fleas are confirmed

When to seek care

Human — see a doctor for infected bites, fever or rash after exposure, or suspected tapeworm. Pet — see a vet to start flea control and check for tapeworm.

The full answer

The full picture

Yes — fleas readily bite people and can spread a few germs and parasites, though serious flea-borne disease is rare in New Hampshire.

Fleas bite people

CDC notes that fleas prefer animal hosts but will bite people when animals aren't available. Cleveland Clinic explains that the flea species that bother dogs and cats don't set up permanent residence on humans — we lack the fur — but they still bite, especially when a hungry flea population is looking for any available blood meal.

Disease transmission is possible but not common

CDC states that fleas transmit germs primarily through biting or when flea dirt (feces) gets scratched into a wound, and that tapeworms can spread if a person accidentally swallows an infected flea — with small children at somewhat higher risk because of hand-to-mouth behavior. These are real but uncommon events, not the typical outcome of a flea bite.

New Hampshire calibration

The honest NH concern is bites and flea-allergy-adjacent skin irritation, not exotic disease. Murine typhus is concentrated in Texas, California, and Hawaii, and plague is confined to the rural western US — neither is a meaningful risk here. Cat-scratch disease, transmitted via flea-contaminated scratches or bites from an infected cat, is the one flea-related human illness genuinely relevant nationwide, including in New Hampshire.

Breaking the cycle

Fleas move from a pet's coat into carpets and bedding, which is why human bites often continue even after a pet has been bathed or treated once. Anchor's integrated home and yard treatment, paired with your pet's vet-prescribed prevention, breaks the life cycle so both pets and people stop getting bitten. For species identification, see /pests.

Remember this

Key takeaways

Yes — fleas bite humans opportunistically, especially when a pet host is treated or unavailable.
Disease transmission from fleas to humans is possible (tapeworm, cat-scratch disease) but uncommon.
Murine typhus and plague are not meaningful New Hampshire risks.
Human bites often persist until the pet, home, and yard are all treated — not just the person.

Fleas biting people means fleas are winning the house.

If people are getting bitten, the environmental reservoir is still active. Anchor treats the home and yard while your vet handles the pet.

Get a Free Inspection (603) 785-0118

Common Questions

Frequently asked questions

Sources(4)

[1]
CDC — About Fleas
Fleas prefer animal hosts but bite people when unavailable
govverified 2026-07-14
[2]
CDC — DPDx Fleas
Germ transmission via bites and flea dirt; tapeworm ingestion risk
govverified 2026-07-14
[3]
Cleveland Clinic — Flea Bites
Fleas don't live on humans but do bite them
veterinaryverified 2026-07-14
[4]
CDC — About Cat Scratch Disease
Cat-scratch disease transmission via flea-contaminated scratches
govverified 2026-07-14

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

Verify license

Last updated 2026-07-14

Integrated Flea & Tick Control

Break the Pet-to-Human Cycle

Human bites are a sign the flea population has spread beyond the pet into your carpet, bedding, and yard. Anchor Pest Services treats the home and yard with life-cycle-breaking methods, paired with your pet's vet-prescribed prevention, across southern and central New Hampshire. Family-owned since 2017, NH license #782664.

Get a Free Inspection (603) 785-0118

IGR-based treatment that breaks the flea life cycle
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Keep Exploring

Can Fleas Spread From Pets to Humans?

The short of it

The flea iceberg

What to do about it

The full picture

Fleas bite people

Disease transmission is possible but not common

New Hampshire calibration

Breaking the cycle

Key takeaways

Fleas biting people means fleas are winning the house.

Frequently asked questions

Break the Pet-to-Human Cycle

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