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

Inappropriate Elimination In Cats: Vet-Approved Guide & Explanation

Cats usually are pretty good about going to the bathroom in their litter boxes, but some occasionally veer off course and start peeing...

What Do Cats Feel When They’re in Heat? Vet Explained Pain, Cycles & Estrus

Perhaps you have been sitting on your couch, enjoying your favorite show, when you have heard the unmistakable sound of a cat howling...

Can Cats Have Allergies? Vet-Approved Signs, Treatment & Prevention Tips

Yes, cats can most definitely get allergies. Just like humans, cats can develop seasonal, environmental, and food allergies, and they can develop allergies...

Can Cats Be Ticklish? Vet-Verified Science & Info

Cats as pets have generally been unpredictable. They move around the house on their own will, they find ways to reach hard-to-reach places...

More related

10 Pet-Friendly Hotels in Asheville NC (2025 Update)

Nobody wants to leave their furry friends at home when they’re traveling for pleasure or business, and with so many dog- and cat-friendly...

100+ Long-Haired Cat Names: Ideas for Soft & Fluffy Cats

When we get to hold our kittens for the first time, we instantly notice how incredibly soft they are! Although we can’t seem...

One Man’s Trash is Another Cat’s Treasure (with Video)

Hi, I’m Dr. Karyn! Read my introduction to learn more about me and meet my five hilarious cats: Clutch, Cyril, Alex, Zelda, and...

5 Best Cat DNA Tests of 2025 – Reviews & Top Picks

Many domestic cats are mysteries. They were either adopted from the shelter, found as strays, or were birthed from other “mystery” cats. Often,...

Keep reading

How Do Cats Jump So High? Vet-Approved Facts & FAQ

Cats have a remarkable ability to jump high, often making it look like they’re almost flying. But how do cats jump so well? It turns out it’s a combination of physical characteristics and behavior, which allow them to make leaps...

cream-colored-maine-coon-cat-jumping-over-the-couch_Nils-Jacobi_shutterestock

Will My Cat Eat My Guinea Pig? Risks, Safety Tips & FAQ (Vet-Verified)

If you’re a cat person who is interested in becoming a guinea pig person or vice versa, you may be wondering if it’s safe to bring the two together. Do cats eat guinea pigs? The good news is that many...

light brown guinea pig in cage enclosure with food

Signs a Cat is Dying: 11 Vet-Verified Changes to Look For

It’s the moment that no cat owner wants to contemplate, but as our feline friends get older or maybe develop an illness, their deteriorating health can begin to show signs your cat is dying. As difficult as this time can...

tired or sick cat

There’s a Sudden Behavior Change in My Cat, Is It a Medical Issue? Signs to Watch For

Cats are fairly consistent animals and creatures of habit. While their personalities may change when they age from kittenhood to adulthood, most cats will sustain the same personality all throughout their lives. So, sudden behavioral changes don’t usually happen without...

cat scratching owner

Skin Tags on Cats: Vet-Reviewed Causes, Care, & FAQ

It can feel alarming when you’re petting your cat, and your fingers suddenly come across a small bump on their skin. However, not all bumps are the same, and some are completely benign. Cats can start to develop bumps and...

vet examining a skin disease of a cat

Is Coleus Toxic to Cats? Vet Approved Advice

Even if you don’t know it, you probably have seen beautiful coleus plants in people’s homes and gardens. These colorful plants are common staples because of their beauty, but that doesn’t mean they’re completely safe for cats. So, is coleus...

Catster_Is Coleus Toxic to Cats

How to Tell If My Cat Is Dehydrated: 8 Vet-Reviewed Signs

Cats don’t always advertise when something is wrong, and if your cat isn’t getting enough water, you might not even realize it if you aren’t paying attention. However, dehydration is a serious condition; cats that don’t get enough water will...

tired sick cat lying on bed

9 Best Wet Cat Foods in Canada in 2025: Reviews & Top Picks

For most of us, cats are part of the family, and we treat them accordingly. Likewise, not much is more important than feeding our cats the right type of food. Wet cat food recipes are formulated to match the cat’s...

Cat-eating-wet-food-from-white-bowl-on-wooden-floor