Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Cat Health & Care

Does UV Light Kill Fleas on Cats? Vet-Reviewed Effectiveness, Safety & Alternatives

By Codee Chessher · Reviewed & fact-checked by Dr. Lauren DemosVet Approved
Dr. Lauren Demos
Reviewed & Fact-Checked byDr. Lauren DemosDVM (Veterinarian)
As a veterinarian, Lauren is eager to share her experience in emergency medicine and cats, with our readers. She loves sharing helpful, real life tips for having cats as part of your life, and what to do in critical situations with your pets.View authorThe information is current and up-to-date in accordance with the latest veterinarian research. Read about our vets
Share
Lamp ultra violet

Fleas are pernicious little parasites, and it can be hard to get rid of them on your cat. This fact has given rise to the rumor of UV light killing fleas, but is it true? UV light can technically kill fleas, but it would take so long that you’d be better off getting rid of your cat’s fleas through more traditional methods, such as those prescribed by your vet.

UV light, like a blacklight, contains a small amount of radiation. This isn’t harmful to people or pets, but it’s known to mutate the DNA in germs. That’s why UV lights are sometimes used to help sterilize surgical environments in the medical field.

Sadly, UV light cannot penetrate a flea’s tough chitinous exoskeleton that well. In theory, though, it could kill fleas. A few unsubstantiated sources online claim that UV wands can get rid of fleas, but there’s nothing to actually back this up.

UV lights might not be the answer to solving your kitty’s flea problem, but don’t worry; we have all the info that you need to treat your cat and home to kill and deter fleas in the future. Dive into the details here!

divider cats oct 2024

How Is My Cat Affected by Fleas?

Fleas are parasitic creatures that feast on warm-blooded critters like your cat, and they live nearly anywhere animals do. Merely taking a walk outside can attract fleas, as they jump on and hitch a ride back to your house. If not taken care of, they’ll feast and multiply on your cat, frustrating them with itchiness in the process.

Cats can experience various signs when afflicted with fleas, and some are less common but more severe. To get a better idea, let’s look at how you can spot a case of fleas on your cat.

Signs of Fleas:

  • Skin Irritation: Cats are fastidious animals that can get hypersensitive to the intense itching from fleas, leading to rashes and even bleeding wounds.
  • Fur Loss: Sometimes caused when severe cases of fleas annoy the cat enough for them to scratch at their own fur repeatedly.
  • Anemia: Kittens and immunocompromised cats are more prone to anemic signs from flea bites, and it can be life threatening if left untreated.
  • Parasites: If your cat eats a flea infested with tapeworm larvae, they could get infested with the parasite themselves.
Image Credit: Maja Marjanovic, Shutterstock
divider cats oct 2024

Other Flea Control Methods

UV light isn’t very effective at controlling fleas, but it can’t hurt as a supplementary measure. As primary measures, your best tools are a good flea comb and topical flea medication. Your vet can also give you advice on how to treat fleas, though products like Frontline and Advantage don’t require a prescription.

Flea Comb

A high-quality fine-tooth flea comb can remove adult fleas and their eggs from your cat’s fur, but it can take a lot of work. This makes flea combs best for when your cat gets the odd flea on them from going outside, but they are less effective at combating heavy flea infestations. Cats are good about grooming themselves, but a good once-over daily session with your flea comb can help reduce the number of fleas in your home in a pinch.

Flea Medication

Topical flea medications recommended or prescribed by your cat’s veterinarian are the most effective tools for both killing fleas and preventing them from coming back. They have an easy-to-use formula that starts working within 24 hours, and you may notice fleas jumping away from your cat during this time.

Topical flea and tick products typically last a month or longer, but read the product’s packaging to stay up to date on when you need to reapply the medicine. Lapses in applying topical flea medications can give fleas time to make a comeback, so mark your calendar.

Image By: Csaba Deli, Shutterstock
divider cats oct 2024

Treating Your Home for Fleas

Fleas aren’t just on your cat or other pets; they can live on your carpet and other flooring too. Fleas love carpets because thick carpet fibers trap skin cells, hair, and other matter that fleas can feast on. They also make an ideal environment for flea eggs, which can reinfest your cat. Let’s go over the best ways to treat your house for fleas to make sure they never come back again.

Ways to Treat Your Home for Fleas:

  • Regularly vacuum all carpets, flooring, and upholstery throughout your home where fleas can live and lay eggs. Immediately empty the canister or vacuum bag into an external trash can to stop them from returning.
  • Wash any pet bedding, clothes, or other fabrics your cat comes into contact with, using hot water if possible. A cycle through the wash and dryer should take care of any fleas and eggs.
  • Don’t neglect hardwood floors either. Fleas don’t like it as much as carpets, but they can live there until a host comes by.
  • Consider using cleaning agents like vinegar, baking soda, and salt to deter fleas and other small insects around the house.
divider cats oct 2024

Conclusion

UV light might be a fine secondary measure for deterring fleas around your house, but it hasn’t been shown to be very effective. Your best options to keep those little bloodsuckers at bay are a flea comb, topical medications, and good housekeeping.

See also:

Sources

Featured Image Credit: Khamklhai Thanet, Shutterstock

The Catster Newsletter

Expert cat care, straight to your inbox

News, insights, and useful advice, delivered to you.

No spam — unsubscribe anytime.

By signing up, you agree to our Terms & Conditions and Privacy & Cookies Policy.

Click a star to rate. You can leave written feedback afterwards. (We read all feedback.)

Codee Chessher
Authored by

Codee Chessher

Leave a Reply

You're very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let's have a positive and constructive conversation.

Does Vacuuming Kill Fleas on Cats? Vet-Reviewed Facts & Advice

Does Vacuuming Kill Fleas on Cats? Vet-Reviewed Facts & Advice

Cats are beautiful creatures, but the fact that they have bodies full of fur cannot be ignored. Some have short hair that rarely needs to be brushed, while oth…

Rachael Gerkensmeyer
By Rachael Gerkensmeyer ·
My Cat Has Fleas! How Do I Clean My House? Vet-Approved Advice & Best Practices

My Cat Has Fleas! How Do I Clean My House? Vet-Approved Advice & Best Practices

No matter how much you may try to prevent it, sometimes cats get fleas. This can even occur if your cat doesn’t go outside. Fleas can get in through open windo…

Christian Adams
By Christian Adams ·
How to Get Rid Of Fleas On Cats: 7 Vet-Approved Methods

How to Get Rid Of Fleas On Cats: 7 Vet-Approved Methods

Fleas on cats can be a nuisance. Not only do they make your kitty itch, but they can also jump onto you and your other pets and transmit diseases. Fleas are a…

Christian Adams
By Christian Adams ·
10 Natural Home Remedies for Cats With Fleas (Vet-Verified)

10 Natural Home Remedies for Cats With Fleas (Vet-Verified)

Fleas can be a real pest to deal with once your cat picks them up, and if left untreated, fleas can become very dangerous for pets, leading to anemia and sprea…

Brooke Billingsley
By Brooke Billingsley ·

Epsom Salt Bath for Fleas on Cats: Vet-Reviewed Effectiveness, Safety & Alternatives

A flea infestation can make your cat miserable and put them at risk of diseases and internal parasites. Some cat owners prefer to avoid using pesticides and ch…

Elizabeth Gray
By Elizabeth Gray ·
Epsom Salt Bath for Fleas on Cats: Vet-Reviewed Effectiveness, Safety & Alternatives

Can a Cat Get Fleas in the Winter? Vet Approved Facts & Tips

No flea life stage can live in cold weather below 30°F for more than 5 days, which leads to the common misconception that your cat can’t get fleas during the w…

Adam Mann
By Adam Mann ·
Can a Cat Get Fleas in the Winter? Vet Approved Facts & Tips

How Many Fleas Is Considered an Infestation on a Cat? Vet-Approved Signs & FAQ

Fleas are a common problem for cats and not only cause various degrees of itchiness and discomfort but can also transmit diseases and pose a risk to anyone in…

Christian Adams
By Christian Adams ·
How Many Fleas Is Considered an Infestation on a Cat? Vet-Approved Signs & FAQ

Does Chlorine Safely Kill Fleas on Cats? Vet-Reviewed Effectiveness & Safety Explained

Fleas are a big problem, and finding out that your cat has them can make you turn to the cupboards for a quick fix. Unfortunately, chlorine is not an option if…

Kerry-Ann Kerr
By Kerry-Ann Kerr ·
Does Chlorine Safely Kill Fleas on Cats? Vet-Reviewed Effectiveness & Safety Explained

How to Use a Flea Comb on a Cat: 4 Vet-Reviewed Steps

Cats are wonderful pets and generally don't require much help from humans in the grooming and self-care department. However, our feline companions sometimes ne…

Lorre Luther
By Lorre Luther ·
How to Use a Flea Comb on a Cat: 4 Vet-Reviewed Steps

Does Heat Kill Fleas on Cats? Here's What Science Says

If your cat has fleas, they can be a nuisance and are incredibly difficult to get rid of without flea treatments. But these treatments can be expensive, so man…

Christian Adams
By Christian Adams ·
Does Heat Kill Fleas on Cats? Here's What Science Says

How to Tell if Your Cat Has Fleas: 10 Vet-Reviewed Signs to Look For

If you’ve never dealt with fleas before, you might be unsure if all of the scratching your cat has been doing lately is the result of fleas or something else.…

Christian Adams
By Christian Adams ·
How to Tell if Your Cat Has Fleas: 10 Vet-Reviewed Signs to Look For

Are Flea Collars Safe for Cats? Vet-Verified Facts & Alternatives

Whether yours is an indoor cat or an outdoor cat, fleas are a constant and potential health hazard. An outdoor cat may be exposed to fleas every time they step…

Gregory Iacono
By Gregory Iacono ·
Are Flea Collars Safe for Cats? Vet-Verified Facts & Alternatives

Love Cats? So Do We! Join the Catster Community

Stay informed with expert cat care insights delivered straight to your inbox! Discover professional guidance on feline behavior, feeding tips, trusted product picks, and much more.

You may opt-out at any time. View our Privacy Policy for more information.

The Catster site on a phone