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 Tea Tree Oil Kill Fleas on Cats? Effectiveness & Safety Reviewed by Our Vet

tea tree essential oil

If your cat has a serious flea problem, you could become desperate enough to try anything to resolve the issue. Waking up with several new red bumps along your skin and watching your cat scratch uncomfortably is never pleasant. Tea tree oil is commonly found in many homes and is effective at killing many types of parasites. It is widely believed to be effective at killing fleas too.

However, the tea tree essential oil is also toxic to cats and shouldn’t be used on their bodies or ingested, regardless of the quantity.

divider 3 paws

Is Tea Tree Oil Effective at Killing Fleas?

Tea tree oil is a natural remedy that is commonly used to treat skin problems in humans and some animals due to its antibacterial and antifungal properties. It is also effective at killing certain types of ticks and lice, but there is little scientific evidence proving that it kills fleas.

Anecdotally, many people claim to have used this essential oil on their pets and around their homes and have had positive results. However, the science disagrees with using tea tree oil near cats because the potential anecdotal benefit is not worth the immediate, potentially life-threatening risk to your cat.

It may be tempting to use essential oil around your home to repel fleas. However, essential oil used around the house (either as drops, sprays, or via a diffuser) are never recommended in cat households. These oils are dangerous for cats in all their forms, as your cat may easily inhale diffused vapors or come into contact with sprays or drops left on a surface. Though some holistic veterinarians are able to formulate cat-safe dilutions for such products, this task is best left to such professionals.

In addition, it is worth noting that if you do have a flea problem, essential oils do not kill fleas, they just repel them. Their inability to effectively kill fleas coupled with the danger to your cat means they shouldn’t be on your list of go-to flea remedies.

dripping natural tea tree oil in bowl
Image Credit: New Africa, Shutterstock

Why Shouldn’t I Use Tea Tree Oil on My Cat?

Tea tree oil isn’t safe to use on cats because if it is accidentally used improperly, it will harm them. One of the biggest concerns is not using the correct concentration of tea tree oil. You may have followed the dilution directions according to the instructions, but there is always a risk that you could be off or that you use too much of the mix on your cat.

Another reason you should never use tea tree oil on your cat is that they are natural groomers that spend most of their day licking themselves. If they ingest the solution, they can become very sick.

You may have noticed that some flea and tick shampoos use tea tree oil in their ingredients. These products are safe to use on your cat because they only contain small amounts of the essential oil, which is evenly distributed throughout the product.  Also, be careful of using undiluted tea tree oil around your home. It will be strong enough to kill some parasites and possibly repel others, but it’s dangerous to you and your cat if you breathe it into your lungs all day long.

If you’re unsure about the right method or medication for treating your cat, you should consult your vet, especially if your pet has an underlying health condition.

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

Signs of Tea Tree Oil Toxicity

According to the Pet Poison Helpline, it only takes seven drops of undiluted tea tree oil to come into contact with your cat’s skin to cause severe poisoning in your pet. Signs of tea tree oil toxicity can present themselves within an hour of your cat touching or ingesting the substance and will include the following:

  • Low body temperature
  • Weakness
  • Skin irritation
  • Uncoordinated walking
  • Inability to walk
  • Tremors
  • Decreased heart rate
  • Coma
  • Death

If you know that your cat has ingested tea tree oil but hasn’t shown any signs yet, don’t wait for them before contacting your vet. It’s important to act quickly and get your cat the treatment they need, as this could save its life.

Sick cat in animal hospital
Image Credit: Kachalkina Veronika, Shutterstock

divider 3 paws

Conclusion

Although there is no scientific evidence that tea tree oil kills fleas specifically, it is effective at killing many other types of parasites and is believed to kill fleas too, although more scientific evidence is needed to confirm this. However, it is not safe to use on your cat because the wrong concentration used on their skin can cause serious health issues. There is also a high risk that they will ingest the substance when they groom themselves, which will lead to tea tree oil toxicity.

Instead, use flea and tick treatments that have been recommended by your vet, as they are safe to use on your cat.


Featured Image Credit: ronstik, 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

Will Cats Get Along With Ferrets? How They Can Coexist

If you are a cat parent but want to introduce a ferret into your family, you’re probably wondering if the two will get...

10 Essential Cat Litter Box Accessories to Get You Started

One of the challenges that cat owners face is coming up with a substantial cat litter box system and cleaning routine. More often...

Are British Shorthair Cats Hypoallergenic? Is It Possible? Vet-Approved Science & Info

British Shorthair cats are sweet, round-faced beauties known for their loyal personalities and muscled bodies. While gray British Shorthair kitties often get the...

90 Gangster Cat Names: Ideas for Your Badass Feline

An edgy name can perfectly encapsulate the spirit of a feline friend that has a feisty, independent personality. Is the cat in question...

More related

Can Cats Eat Pancakes? Vet-Verified Nutritional Facts & Health Advice

If you have a family tradition of eating pancakes for breakfast on a Saturday morning, you might feel bad for excluding your cat....

Are Egyptian Maus Hypoallergenic? Vet-Approved Facts & FAQ

If you’re an allergy sufferer and pet lover, you’re likely looking for a companion that won’t make your eyes water every time you’re...

10 Best Flea Powder for Cats in 2025 – Reviews & Top Picks

Fleas are one of the most common pests that affect cats, and they can rapidly create an infestation in homes. If you’ve found...

How Do Cats Give Birth? (Vet Approved Pregnancy & Labor Facts)

It can come as a surprise to find out your cat is pregnant; most likely, you thought she’d only put on a bit...

Keep reading

Acana Cat Food Review 2025: Recalls, Pros & Cons

Review Summary Introduction ACANA has various premium cat food recipes and flavors that are rich with animal protein and nutrients to ensure that your cat gets everything that they need for a complete and balanced meal. It has diets specifically...

Acana Cat Food Review

Messy Mutts Messy Cats Interactive Slow Feeder Review 2025: A Detailed Look

If you have a tubby tabby or a food-obsessed Felix, you’ve probably considered using a slow feeder. But finding an effective, quality slow feeder that works for cats can be tricky. I know, I’ve been searching for one for my...

Messy Mutts Messy Cats Interactive Slow Feeder

Where to Find a Healthy, Happy Purebred Kitten – Without the Risks

Last fall, Sarah fell in love with a tiny silver tabby online. In the photo, the kitten was curled in a wicker basket, one paw draped lazily over the edge, eyes bright with curiosity. The breeder promised she was “ready...

How to Cat Proof Blinds: 7 Helpful Tips to Try Today

Cats and blinds aren’t a great mix, as any cat parent knows. While cats may enjoy batting at dangling cords or trying to get their heads through the slats to see what’s on the other side, the experience is less...

kurilian-bobtail-cat-standing-on-the-window-perch

My Old Cat Is Peeing Everywhere Suddenly: Vet Verified Causes & Care Tips

When your senior cat (or a cat of any age, for that matter) that is usually fastidious about using their litter box suddenly starts urinating all over your home, it can be worrying, to say the least. Cat pee is...

brown cat peeing

10 Best Flea Treatments for Cats (2025) – Reviews & Top Picks

Fleas are a pesky part of owning a cat. They can pop up at practically any point, even if your cat spends all their time inside. Once you have an infestation, they are very hard to get rid of. They...

Man in gloves holds medicine

10 Best Cat Foods for Constipation In 2025 – Reviews & Top Picks

Does your kitty need help, “moving things along”? Have you noticed they haven’t passed feces for a few days or have small dry poops? If so you may be wondering what are the best foods for constipation in cats. As...

side view of tabby cat eating pet food from feeding bowl on white background with copy space

Is Christmas Cactus Poisonous to Cats? Vet-Reviewed Houseplants Examined

The unfortunate truth of living with cats is that you’ve signed up to live with a pet that will get into everything—plants included. If you have a Christmas cactus in your home, you might wonder if this plant is poisonous...

Catster_Is Christmas Cactus Poisonous to Cats