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

Can a Cat Smell Cancer? Facts & Surprising Stories (Vet-Reviewed)

Most days when you turn on the news, you’ll hear an amazing animal story. Whether it’s about a hero police K9, a dog...

7 DIY Cat Gift Bag Ideas You Can Make Today (With Pictures)

Homemade gift bags are easy to make, and they’re great options for kids and beginning crafters, as well as experienced DIYers looking for...

When to Switch From Kitten Food to Cat Food? Vet-Reviewed Facts & FAQ

Cats, like people, have different nutritional and dietary requirements at different stages of life. Kittens have seemingly boundless energy, and they need to...

National Pet Hydration Awareness Month 2025: When & How to Celebrate It

Summers can be brutal, so staying hydrated is more important than ever. But while we can easily drink more water when it’s hot,...

More related

Fancy Feast Cat Food Review in 2025: Recalls, Pros & Cons

Review Summary If you’ve been researching cat foods, you’ve probably seen the name Fancy Feast. This well-known brand has been around since 1982...

Mobile Vet Clinics & Care: Our Vet Discusses Pros, Cons & FAQ

Your cat is wonderful at home but turns into some sort of Tasmanian devil the moment she gets to your veterinarian’s office. Is...

Sudden Weight Loss in Cats: 12 Possible Causes & What to Do (Vet Answer)

Cats are not always the most forthcoming when it comes to illness, and it’s up to us to be on the lookout for...

Will Mice Leave If They Smell a Cat? Vet-Reviewed Prevention Tips & Advice

Cats and mice are age-old enemies pitted against each other in the media and in life. Although cats seem to be freeloaders around...

Keep reading

Is Lidocaine Safe For Cats? Our Vet Discusses Safety & Risks

Even though cats typically aren’t as vocal or outwardly expressive of their pain as canines, they do still experience pain, leading veterinarians to look for safe and effective pain management medications. One that you may be wondering about is lidocaine....

Catster_Is Lidocaine Safe for Cats

How Do Cats Drink Water? Vet-Approved Facts

Have you ever watched a cat drink water before? It’s not something many people think too much about, but it’s truly an amazing feat of physics that requires perfect timing and balancing inertia with gravity. Sounds unbelievable? Keep reading to...

cat drinking from cat water fountain

How to Prevent Hairballs in Cats: 4 Vet Approved Methods

There’s nothing like cleaning up a hairball to start your morning, and the ensuing cleanup is sure to leave a scowl on your face for the rest of the day. Luckily, preventing hairballs is simple, and it doesn’t take a...

cat hairball

15 Common Household Hazards for Cats & Vet-Approved Safety Tips

Cats can be incredibly curious, and many seem to have the remarkable ability to find new ways to get in trouble. Pets thrive when they’re free to investigate and explore with enthusiasm, but you must ensure they play in safe...

an orange tabby cat looking up

How to Tell If a Cat Has Anxiety (12 Signs to Look Out For)

Anxiety isn’t something experienced by humans only; cats can also get it. It can be caused by various factors, like past trauma or a cat’s natural disposition. When your cat is anxious, they may anticipate a danger ranging from the...

scared British blue-point cat hiding under the bed

Why Do Cats Stick Their Tongue Out? 10 Vet-Verified Reasons

You might better know a cat with its tongue out as a “blep”, and it’s just one of the reasons that we love cats so much. It’s unclear exactly where that term comes from, but go ahead and search for...

cat bleps

How Long Do Sphynx Cats Live? Vet Reviewed Lifespan, Care Tips & FAQ

You can’t help but notice a Sphynx cat. The large ears and almond-shaped eyes command your attention. It’s no wonder that they are the 10th most popular breed! Of course, the kitty’s outgoing and energetic personality also helps endear them...

calico sphynx cat on the table

How Do You Determine a Cat’s Sex? A Vet-Approved Guide

Determining the sex of your cat can be confusing, especially if they are a kitten or are still young, as it is not always obvious. Given that male cats do not have visible testicles until they are approximately 6–10 weeks...

Thai Siamese point cat, with blue eyes, lying on the couch