Get

In Your Inbox

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.

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

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.
Cat with fleas
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.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

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.

applying flea treatment to cat
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:


Featured Image Credit: Khamklhai Thanet, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

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.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Does Your Cat Believe That You’re a Cat, Too? John Bradshaw Has an Opinion on This

As most of you dedicated Caster readers know by now, I’m a total geek when it comes to cat science and behavior. When...

Do Our Cats Feel Happiness? 5 Signs & Playing Tips

Research shows that cats have systems of emotions that trigger certain emotional and behavioral responses.1 However, the word emotion in this sense refers...

What Vaccines Does My Cat Need? Our Vet Explains the Vaccine Schedule From Kittens Up

Cat owners recognize that providing nutritious food, fresh, clean water, and a comfortable and safe environment is essential for happy and healthy pets....

What Is the Best Type of Carpet for Cats That Scratch? (Facts, & FAQ)

Cats and carpets are not a good match, with the main reason being cats’ love for scratching. But scratching is vital for a...

More related

How Much Should My Cat Weigh? Vet-Approved Chart & Infographic

Cats are one of America’s favorite pets, but as more of them spend their lives indoors, they are also putting on more weight....

10 Best Non-Clumping Cat Litters in 2025 – Reviews & Top Picks

Before bringing home your new kitten or cat, you know that there is a ton of research to do, from what toys, bedding,...

10 Best Cat Cooling Mats and Pads in 2025 – Reviews & Top Picks

We all know that summer can get hot! If you’re without air conditioning, it’s not only hot for you but hot for your...

10 Best Dematting Tools for Cats in 2025 – Reviews & Top Picks

Keeping your feline healthy and happy is your top priority, but are you brushing your cat’s hair every week? Cat owners often disregard...

Keep reading

Is Bamboo Toxic to Cats? Vet-Verified Facts, Risks & FAQ

True bamboo is a subfamily called Bambusoideae. This is considered a safe plant to keep or grow around pets, including cats and dogs. However, several other plants and flowers contain the word bamboo but are not bamboo at all. Some,...

Catster_Is Bamboo Toxic to Cats

Why Does My Cat Need Mental Stimulation? 7 Vet-Approved Reasons

Cats are quite curious and inquisitive by nature, so they require a significant amount of mental stimulation to satiate their curiosity and keep them happy. Along with keeping them engaged, mental stimulation can also boost a cat’s mood, increase their...

two cats playing with toy at home

Nebelung Cat Health Problems: 6 Common Issues

Nebelung cats are still a relatively rare breed. They have a very long lifespan of up to 18 years. But because they have only been around since the 1980s, there still isn’t a lot known about their overall health and...

Catster_Health Problems of Nebelung Cat

Can Cats Get Lice? Vet-Approved Facts & Treatment Tips

Lice are a common problem for most pet owners, especially if your pet enjoys the outdoors. They can cause skin disease and itchiness, affect your pet’s coat, and even cause a variety of health complications. Many cats, especially those who...

cat scratching itself

Why Do Cats Like Hair Ties? 10 Vet-Approved Reasons

Have you ever wondered why cats seem to be so fascinated with your hair ties? It seems like they can’t resist the urge to play with them, chew on them, and even try to catch them! There are actually many...

scrunchies hair ties ponytails

10 Best Chew Toys For Cats in 2025 – Reviews & Top Picks

Dog owners are painfully aware of their pet’s need for safe chew toys, frequently at the expense of their shoes. However, cat owners might not know that their kitties also benefit from chewing on toys. Teething kittens need relief just...

Hepper Catnip Stick Toy - White Cornish Rex on Bed

5 Homemade Cat Food Recipes (Vet Approved)

If you’re worried about what goes into your cat’s food, there’s one way to know for sure, and that’s by making your own at home. This might sound like a straightforward solution, but getting the right balance of nutrients for...

Homemade Cat Food Recipes

Siamese Cat Health Problems: 7 Vet-Reviewed Issues

Siamese cats are among the most popular cat breeds in the United States. They are intelligent, vocal, affectionate, and have dog-like personalities. They are also strikingly beautiful with piercing blue, almond-shaped eyes. With these amazing characteristics, it’s no wonder they...

Catster_Health Problems of Siamese Cat