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Table of Contents
What are cat worms?
What is the tapeworm life cycle?
Will all fleas give my cat worms?
How do I know if my cat has fleas?
If my cat has fleas, are they in my home?
How do I get rid of fleas and stop them from coming back?
How do I know if my cat has worms?
Symptoms to watch out for
How do I get rid of worms in my cat?
So if I have an indoor cat, will they be safe from fleas and worms?
Let’s get straight to it, fleas can play a role in giving your cat a particular kind of worm, tapeworms. Keep reading to find out how this happens and what you need to prevent worms and fleas.
Most of the common intestinal worms in cats fall into two groups: Roundworms and tapeworms.
Roundworm infestations tend to happen when your cat ingests worm eggs (for example, from contaminated soil, faeces, or prey).
Tapeworms, especially the species Dipylidium caninum, have a somewhat sneaky life cycle that does involve fleas as an intermediate host.
Flea larvae in your home environment ingest tapeworm eggs (or proglottids) that are present in faeces or the environment.
Inside the flea larvae (or pupae), the tapeworm eggs develop into an infective stage.
A mature flea emerges and may infest your cat.
When your cat grooms itself, it might ingest one of these fleas accidentally.
Once inside the cat’s gut, the tapeworm then matures, attaches to the intestinal wall, and begins producing segments full of eggs, which are passed out in the faeces or sometimes drop out near the anus or in bedding.
Because of that life cycle, a cat with fleas has a risk of acquiring a tapeworm infection.So if a cat has fleas, it should also be wormed (for tapeworm) at the same time. You can easily do this with Itch Flea and Wormer subscription, which tailors vet-strength flea and worm treatments to your pet and delivers them every time you need protection.
No, not all fleas give cats worms, but any flea that is infected with the larvae of the flea tapeworm can transmit the parasite if your cat swallows it. And fleas do not transmit all types of worms (e.g. roundworms, hookworms). Even if your cat has fleas, it doesn’t guarantee it has tapeworms, the ingestion step must occur. Cats that go outdoors are more likely to get fleas but any cat can get fleas. And remember, a cat can have worms without any flea infestation too.
Signs your cat might have fleas
Intense scratching or biting at their coat, especially around the neck, base of tail, or underbelly
Bald patches, skin irritation, flea bite dermatitis
Flea dirt which are tiny black specks in the fur. You can check by brushing the fur with a flea comb and wiping the excess on a damp tissue paper. If the specks turn reddish, it’s flea faeces (digested blood).
Hair may be rough or spiky
In severe infestations, cats (especially kittens) might suffer anemia from blood loss.
You might spot live fleas — though that’s less common, since they move fast
Sadly most of the flea population isn’t on your cat, it’s in your home! 95% of fleas during an infestation actually live in your home and this might be on your carpets, soft furnishings, bedding, cracks, under radiators, and so on.
Flea eggs, larvae, and pupae can survive in the environment (in carpets, cracks, dust) and may lie dormant waiting for a trigger (vibrations, warmth and CO₂) to emerge as adult fleas.
So by the time you see fleas on your cat, there may already be a full-blown flea population in your home.
Time for a plan of action! Fleas are notoriously tenacious, so you’ll need a multi-pronged approach, follow these steps to kill 100% of fleas and their eggs.
Treat the cat (and other pets)
Use a vet-recommended flea treatment like Itch Flea Treatment for Cats and Itch Flea Treatment for Dogs which is tailored to your pet and delivered for free, to your door, exactly when you need it.
Always use tailored products for cats labelled because many dog flea treatments contain permethrin, which is extremely toxic to cats.
If you have more than one cat or other pets treat them all with tailored flea treatment on the same day to avoid re-infestation.
Be consistent with your flea treatment, vets recommend you apply every month as fleas reproduce fast and can infest your pet at any point in the year.
Use a flea comb: Brush through your cat’s fur (especially near the tail, neck) over a white piece of paper or cloth. Any fleas or flea dirt will fall out. This doesn’t replace treatment but helps you spot fleas early.
Always read and follow instructions carefully as this could result in failed flea treatment (dosage, application point, avoiding bathing soon after application, etc.). Click here to learn how to apply flea treatment to your cat.
If your cat has skin wounds, allergies, or is unwell, consult your vet before applying treatments.
Tackle the environment
Because fleas are hiding everywhere, you must treat more than just the cat — treat the surroundings:
Wash all pet bedding (blankets, cushions, covers) at 60 °C or above where possible. This will kill fleas and eggs.
Vacuum thoroughly — carpets, rugs, sofas, crevices, under furniture — and do so often. The vibrations help trigger pupae to emerge, which you then vacuum up.After vacuuming, dispose of the vacuum bag or empty the container, seal in a bag before discarding, so fleas don’t escape back into the house.
Use household flea sprays for the home environment, like Itch Flea House Spray for Homes which kills fleas and flea eggs for up to 2 months after one blast!
Treat outdoor hideouts (garages, sheds, cat runs) or places your cat frequents, if possible.
Minimise wildlife or stray animals bringing fleas in if possible (for instance, secure bins, limit entry points).
Prevent recurrence
Continue using a maintenance flea treatment year-round, especially in warmer months.
Comb your cat regularly to check for fleas
Keep up vacuuming and washing on a high heat frequently.
When new items (rugs, furniture) come in, take care (vacuum, inspect).
Monitor other pets, or visits from other animals (neighbours’ cats, etc.), for fleas.
Keep your cat’s living area as clean and uncluttered as possible, reducing hiding spots for fleas.
With a persistent and thorough approach, you can break the flea life cycle and bring the infestation under control. But remember — fleas are sneaky. Sometimes you’ll have to keep at it for several weeks to be confident they’re gone.
Worms are harmful in their own right, but since fleas can also transmit tapeworms, it’s good to know the signs so you can catch any infestation in time.
Common worms in cats:
Tapeworms (e.g. Dipylidium caninum) are often associated with fleas
Roundworms are the most common intestinal worm in cats.
Cats are often very good at hiding illness, so you may only notice subtle signs:
Segments of tapeworm — small, grain-of-rice-like bits in or around faeces, or stuck to the fur near the anus or tail base
Weight loss, even though appetite might remain good
Increased appetite (trying to compensate)
Diarrhoea or loose stool
Vomiting (especially in heavy infestations). Occasionally, worms are visible in vomit or faeces.
Irritation around the anus (“itchy bottom”)
Pot-belly appearance in kittens (severe worm burden)
In severe cases (especially in kittens), malnutrition, failure to thrive, general weakness
If you see any of these, get your cat to the vet for diagnosis. It’s worth noting that even cats with no obvious symptoms can harbour worms.
Once you think you know it's worms, treatment is relatively straightforward but it must be done properly!
Choose the right worming agent
Some wormers (tablets, spot-ons, injections) cover roundworms only whereas others tackle all common intestinal worms, like the Itch Wormer Tablets for Cats.
If your cat has both fleas and worms, it’s important to use treatment to kill both of these parasites - One treatment won’t kill both.
Ensure the product is safe for your cat’s age, weight, health status and pregnancy/lactation. At Itch our vet experts are on hand to help, Get In Touch if you need to check if wormer is suitable for your cat.
Administer the treatment correctly
Give the entire dose in one go (unless advised otherwise)
Always follow the recommended timetable and repeat treatments if specified
Keep up regular worming (e.g. every 2–3 months or more often if your cat is high-risk)
Some cats may resist tablets, so mixes, pastes, or spot-on wormers might be preferred
Clean up to prevent reinfection
Dispose of faeces promptly (in sealed bags) so eggs don’t contaminate the area
Clean the litter tray daily; give it a deep clean with hot soapy water periodically
Wash bedding, blankets, and soft furnishings from the cat regularly
If worms were in the house, steam-clean carpets, launder carpets/rugs, or use appropriate cleaners
Maintain hygiene: wash hands after handling litter or pet waste
Preventing worms in the future
Continue regular worming schedule based on your vet’s recommendation
Keep up flea control, since fleas can transmit tapeworms
Discourage your cat from eating wild rodents or birds (if possible)
Monitor for signs, and test periodically (faecal checks)
Ensure other pets in the home are also treated (dogs, rabbits) to prevent cross-transmission
Not quite true. Fleas can hitch a ride on people (clothes/shoes), on other pets, or through windows/doors. Indoor cats are not immune.
So fleas can give your cat tapeworms, which is a compelling reason not to ignore even a small flea problem. But fleas are only one path of parasite risk. Worms can come from other routes (soil, prey, faeces), and many cats harbour worms without obvious signs.
The good news is that with a consistent, multi-layered approach, you can keep both fleas and worms at bay:
Use vet-recommended treatments for flea control
Maintain a regular worming schedule appropriate to your cat
Be vigilant in cleaning and treating the home environment
Monitor your pet’s health and act early if you spot signs
Consult your vet whenever in doubt
Vet strength flea and worm treatments, tailored to your pet and delivered for free, every month, so you never forget.
Itch Flea kills adult fleas on your pet in 24 hours and halts all other flea life stages. Itch Wormer kills all common intestinal worms and prevents newly hatched larvae from growing and multiplying.
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