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

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

10 Best Cat Trees Under $100 in 2025 – Reviews & Top Picks

Cats love and need to climb and scratch. It’s in their nature. A cat tree provides an easy and fun way for them...

Why Do Cats Cough After Surgery? Medical Facts Explained (Vet Answer)

When your feline friend undergoes surgery, it can be a scary time. What can be even worse is when your cat comes home...

9 Health Risks for Overweight Cats (Vet Answer)

“Chonky” cats, though rather adorable, may be prone to serious health risks due to being overweight. Nearly 60% of cats in North America...

Ragdoll Kittens for Sale: 2025 Breeders List in Canada

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

Siamese Cat Genetics: Does It Affect Siamese Behavior? Temperament Facts

Talkative, always wanting to be around you, and a bit needy—these are all common traits and behaviors of the Siamese cat. These behaviors...

Urinary Blockage in Cats: Causes, Symptoms, and Care (Vet Answer)

Urinary blockages in cats are one of the most serious medical issues that cat owners and veterinarians alike must deal with. True blockages...

14 Oriental Shorthair Colors & Patterns (With Info & Pictures)

Oriental Shorthairs come in the most colors of any recognized cat breed. These felines were originally bred from the Siamese, which only has...

How to Make My Cat More Confident: 12 Steps to Follow

Does your cat run and hide when they hear someone at the front door? Do they dash away under the bed when they...

Keep reading

4 Angry Cat Sounds & Vet-Approved Tips on How to Calm Them

Cats often express their emotions—which can include anger and aggression—through various sounds. If your cat is making angry sounds that have you worried, it’s important to understand the cause and find ways to calm them down. Keep reading while we...

abyssinian cat hisses

8 Common Types of Cat Brushes (With Pictures)

Cats are known for their fondness for grooming and keeping themselves clean, but there are times we cat parents need to lend them a helping hand. No matter how fastidious your favorite feline is, they won’t always be able to...

brushing a ragdoll cat

Can Cats Eat Raw Chicken? Vet-Reviewed Facts & Recommendations

There’s quite a bit of controversy today concerning whether or not cats should eat raw meat. In the wild, cats of old would capture their prey and eat them on the spot. What about after thousands of years of domestication?...

Can Cats Eat Raw Chicken

Ragdoll Cat Grooming: 10 Vet-Approved Tips & Tricks

Ragdoll cats were developed in the early 1960s in California and are among the most affectionate and friendly cat breeds around today. Their semi-longhaired coats are thick and don’t often tangle, but these cats can still benefit from regular grooming...

flame point ragdoll cat

Why Does My Cat Walk on Me? 7 Vet Approved Reasons for This Behavior

If you have a cat that walks all over you either when you’re awake or when you’re sleeping, you may find it strange and possibly even annoying. It’s natural to wonder what the cause of this behavior could be, and...

cat on lap

Can Cats Eat Cornstarch? Vet-Reviewed Health Risks & Advice

Cornstarch is one of those foods used as an ingredient in a variety of things. You may eat cornstarch without even realizing it because it is often used in foods as a thickener for a variety of foods, including stews,...

Can Cats Eat Cornstarch

Can Cats Eat Kidney Beans? Vet-Reviewed Facts & Health Guidelines

Kidney beans are a tasty legume chock full of health benefits for humans, but are they something you can share with your cat? While cooked kidney beans aren’t toxic for kitties and offer some nutritional benefits, they aren’t found in...

Can Cats Eat Kidney Beans

Will a Humidifier Help a Cat with Congestion? Vet Reviewed Facts & FAQ

We all have childhood memories of having a cold, being congested, and our moms dragging out and plugging in the humidifier to loosen up the congestion and help us breathe. In fact, most of us have done it for our...

cat sitting near humidifier