Last updated: 5 October 2026 · Sources: PDSA, Cats Protection, NHS, RSPCA
The short answer
No. Fleas can bite humans, but they can't live on us. That's the PDSA's wording, and Cats Protection agrees: humans can't get fleas, although a pet's fleas may bite you. The fleas biting your ankles are living on your pet and in your home. So the answer isn't to treat yourself. It's to protect your pet and clean the places where they sleep.
- Fleas bite people but don't live or settle on us
- Flea bites on people are usually found in groups below the knees
- About 95% of flea eggs, larvae and pupae are in the home, not on your pet
- Bites on you are often the first sign your pet has fleas
- Protecting every pet and cleaning the home is what stops the biting
Why am I getting bitten if fleas don't live on people?
Because you're nearby when a flea is hungry. It's one of the most unsettling moments of owning a pet: itchy bites on your ankles, and the sudden worry that you've "caught" fleas.
You haven't. Cats Protection explains that if your cat has fleas they may bite you, but they're unlikely to keep doing so, because they feed on your cat's blood, not human blood.
So bites on you are really a message about your pet and your home. It's not about how clean you or your house are.
Can fleas live in human hair?
No. The PDSA is clear that fleas can bite humans but can't live on us, and that includes our hair. A flea may land on you and bite, but it won't set up home there.
If you have an itchy scalp and you're worried, speak to a pharmacist, as something other than pet fleas is likely to be the cause.
What do flea bites look like on humans?
According to the NHS, flea bites are usually found in groups below the knees. That's why ankles and lower legs get the worst of it.
They're itchy, and it's tempting to scratch. The NHS advises against scratching insect bites.
Fleas on pets vs fleas on people: what's the difference?
Pets are where fleas live and feed. People just get bitten in passing. This table sums it up:
| On your dog or cat | On you | |
|---|---|---|
| Can fleas bite? | Yes | Yes (PDSA) |
| Can fleas live there? | Yes, they live and feed on your pet | No, fleas can't live on us (PDSA) |
| Where you notice it | Scratching, and flea dirt, often on the lower back (PDSA) | Groups of bites below the knees (NHS) |
| What to do | Use a flea product made for that species and ask your vet | Don't scratch; ask a pharmacist if the bites bother you (NHS) |
How should I treat flea bites on myself?
Most insect bites can be looked after at home. The NHS advises:
- Putting something cold on the bite, such as a cold compress, for at least 20 minutes if it's swollen
- Not scratching the bite
- Asking a pharmacist about antihistamines or creams to ease itching
The NHS says to call 111 if your symptoms are getting worse, and 999 for signs of a serious allergic reaction such as a swollen face or difficulty breathing. For a child under 1 year old who has been bitten, the NHS advises seeing a GP.
Where are the fleas actually coming from?
From your pet and, mostly, from your home. The RSPCA estimates that 95% of flea eggs, larvae and pupae live in the environment, not on your pet.
A female flea can lay up to 50 eggs in one day (RSPCA). Cats Protection says fleas like hiding in crevices, pet bedding and other soft furnishings, and lay their eggs there.
The PDSA's rule of thumb makes the scale clear: 50 fleas living on your dog means around 1,000 fleas in the home.
It often comes as a surprise. Owners of indoor-only cats are often surprised to find fleas; it comes up again and again in what customers tell us (customer reviews, read 27 September 2026).
Can I get fleas if I don't have a pet?
You can still be bitten. Flea cocoons can remain dormant for up to six months, according to Cats Protection, so fleas can hatch in a home long after a pet has gone. This sometimes happens after moving into a house where pets used to live.
If you have no pets and the biting carries on, contact a professional pest controller or your local council for advice.
What do UK vet charities advise?
The PDSA, Cats Protection and RSPCA all point to the same fix: deal with the fleas on your pet and in your home, and the bites on you stop.
- PDSA: fleas can bite humans but can't live on us. Wash bedding at 60°C or hotter, and call your vet practice for advice if you think your dog has fleas.
- Cats Protection: vacuum regularly, and never use a dog flea treatment on your cat.
- RSPCA: you may need to treat your pet and home for fleas all year round if your home is centrally heated.
The RSPCA also warns that some dog flea treatments contain permethrin, which is safe for dogs but highly toxic to cats. The PDSA adds that household flea sprays often contain permethrin, which is extremely toxic to cats, fish and birds. Always read the label.
How do I stop fleas biting me and my family?
Break the link between your pet, your home and your ankles. Four steps do it.
Step 1: Check your pet
Comb your pet over white paper and add a few drops of water to any dark specks. The RSPCA says that if they turn reddish brown, it's very likely your pet has fleas.
Step 2: Protect every pet
Dogs and cats alike, each with a product made for their species. One unprotected pet keeps the problem going for everyone.
Step 3: Clean where pets sleep
Wash bedding at 60°C or hotter (PDSA) and vacuum carpets, sofas and rugs regularly. If your dog sleeps on your bed, wash your own bedding too.
Step 4: Keep protection going without gaps
Fleas return when protection lapses. The easiest way to avoid gaps is protection you don't have to remember every month.
Stop fleas at the source, your dog: BIO-COLLAR™
Fewer fleas hitching a ride on your dog means fewer in your home. The BIO-COLLAR™ is a plant-based collar made with essential oils, including lemon eucalyptus and citronella. It's designed to help keep fleas and ticks away for months, with no monthly spot-ons to remember.
- ✔ Plant-based essential oils, no synthetic pesticides
- ✔ Long-lasting: no monthly routine to forget
- ✔ Adjustable and water-resistant
- ✔ Covered by our 30-day money-back guarantee
Like all natural options, it works best as prevention. If you're already being bitten at home, clean the house and speak to your vet first, then use the collar to help keep fleas from settling back in. Keep doing your regular checks.
Myth vs fact
Myth: I've caught fleas from my dog.
Fact: Fleas can bite humans, but can't live on us (PDSA).
Myth: Fleas are living in my hair.
Fact: They don't live on people. Bites are usually in groups below the knees (NHS).
Myth: Flea bites mean my house is dirty.
Fact: Fleas need a pet and soft furnishings, not dirt. About 95% of young fleas are hidden in the environment (RSPCA).
Myth: If I treat my own bites, the problem is solved.
Fact: The bites stop when the pet and the home are dealt with.
Your no-more-bites checklist
✔ Check your pet with the wet paper test
✔ Protect every pet with a product made for its species
✔ Wash bedding at 60°C or hotter
✔ Vacuum carpets and sofas regularly
✔ Keep your dog protected all year, with long-lasting natural protection
Frequently asked questions
Can fleas live on humans?
No. The PDSA says fleas can bite humans but can't live on us, and Cats Protection confirms that humans can't get fleas. A flea may bite you, but it lives and feeds on your pet. To stop the bites, protect your pet and clean the areas where they sleep.
Can dog fleas live in human hair?
No. Fleas from your dog or cat don't live in human hair. They can jump onto you and bite, most often around the ankles and lower legs, but the PDSA is clear they can't live on us. If your scalp is itchy, ask a pharmacist for advice.
Can fleas live in my bed?
Fleas can end up in your bed if your pet sleeps there. Cats Protection says fleas like hiding in pet bedding and other soft furnishings, and lay eggs there. Wash bedding at 60°C or hotter, as the PDSA advises, vacuum the bedroom, and protect your pet so they stop bringing fleas in.
How long do flea bites last on humans?
It varies from person to person, and the NHS doesn't give a set time for flea bites. Most insect bites can be treated at home by not scratching and using a cold compress. If a bite isn't improving or your symptoms are getting worse, the NHS advises calling 111 or asking a pharmacist.
Do I need to see a doctor for flea bites?
Usually not. The NHS says a pharmacist can help with insect bites, for example with antihistamines or creams. Call 111 if your symptoms are getting worse, and call 999 for signs of a serious allergic reaction, such as a swollen face or difficulty breathing. See a GP if a child under 1 has been bitten.
Final thoughts
Fleas can bite you, but they can't live on you. If your ankles are itching, the real problem is on your pet and in your carpets, and that's good news, because both can be dealt with. Protect every pet, clean where they sleep, and keep protection going without gaps. For dogs, a low-maintenance option like the BIO-COLLAR™ makes that easy.
Keep reading
- Why Do Fleas Keep Coming Back After Treatment?
- Do Fleas Die in Winter? (What UK Pet Owners Need to Know)
- Can Indoor Cats Get Fleas?
Sources: PDSA, Fleas on dogs (pdsa.org.uk); Cats Protection, Fleas (cats.org.uk); NHS, Insect bites and stings (nhs.uk, last reviewed 1 June 2023); RSPCA, Fleas (rspca.org.uk). All read 5 October 2026. This article is general information, not veterinary or medical advice. If you're worried about your pet's health, contact your vet. If you're worried about your own health, speak to a pharmacist, your GP or NHS 111.