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

120 Historical Cat Names Inspired by Ancient Figures

When you bring home a new cat, one of the first tasks is to name your feline companion. Coming up with a name...

Why Is My Cat Not Drinking Water? Vet-Reviewed Reasons & Solutions

Keeping our cats hydrated can be a bit tricky. Cats are notorious for not drinking enough, so we need to find ways to...

What Causes Sudden Fever in Cats? Our Vet Explains Causes, Signs & FAQ

One of the most frustrating things we face as pet owners is when our furry family members don’t feel well, especially when we...

Persian Kittens For Sale in Utah: Breeders List 2026

Excited Cats advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it...

More related

13 DIY Cat Castles You Can Make Today (With Pictures)

Almost every cat believes they are the king or queen of the household, so why not give them an actual castle to rule?...

Are Pussy Willows Poisonous to Cats? Vet-Reviewed Houseplants Examined

If you grew up in Canada and the northern United States, you’re probably familiar with pussy willows. Children are especially drawn to these...

Cushing’s Disease in Cats: Our Vet Explains Causes, Signs & Treatments

If you are a dog owner, there’s a good chance you’ve heard of Cushing’s disease. If you are owned by a cat, however,...

Grey Munchkin Cat: Info, Pictures, Facts & History

The Munchkin cat breed is easily one of the most recognizable around. These cute short-legged cats are on the wish list of many...

Keep reading

Fever Coat in Kittens: What Is It? Vet Reviewed Science & Facts (With Pictures)

Do you have a kitten that seems to have mysteriously changed colors? If so, they may have a fever coat. Although “fever coat” may sound scary, it is nothing to worry about and does not harm your kitten. Although it’s...

gray kitten plays on floor

9 Best Cat Brushes in Australia in 2026: Reviews & Top Picks

When it comes to finding the best cat brushes, Australians have plenty of options. A quick online search will reveal dozens of products, all claiming to be the perfect solution for your feline friend. So how do you know which...

person brushing a gray cat

Does Lemon Juice Kill Fleas on Cats? Vet-Verified Effectiveness & Safety Explained

Keeping our pets parasite-free is big business, with a projected 2026 global revenue of $3.68 billion.1 Fleas are quite the nuisance on several fronts. These pests can cause allergic reactions in pets while increasing the risk of secondary infections if...

lemon juice

Can Cats Eat Ketchup? Vet-Reviewed Diet Facts & FAQ

When considering what kind of human foods are okay to give to our cats, we’re usually thinking in terms of actual food and not condiments, such as mayonnaise or ketchup. However, there’s always a chance our feline friends could manage...

Can Cats Eat Ketchup

Why Is My Cat’s Poop Watery? 8 Vet-Approved Reasons

Changes in bathroom habits are one of cat parents’ biggest causes of worry. Though diarrhea in cats isn’t the most unusual phenomenon, it’s crucial to figure out what may be causing it, especially if it’s regularly affecting your cat. Watery...

orange cat pooping on the grass

How Often to Change Your Cat’s Water? Vet-Approved Care Tips

We all know that cats need fresh water daily, but if you have a larger bowl that they don’t empty each day, how often do you need to change it out? The truth is that you need to give your...

cat and orange bowl inside the house

What Houseplants Are Poisonous to Cats? 15 Vet-Verified Toxic Types

Wondering what plant to get that won’t upset your cat? We’ve got you covered. This post lists 15 common houseplants that should be avoided by cat owners—usually. In some cases, cat owners can have a plant that is not necessarily...

a black cat with succulent plants

Scruffing a Cat: Vet-Reviewed Risks & Safety Advice

Cats have been beloved companions to humans for centuries; art, writing, and antiquities from cultures across the world feature cats. Due to their popularity, cat enthusiasts often find themselves navigating a vast sea of information on how to best care...

Owner grabbing a cat by the Scruff