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.

Why Is My Cat Hissing at Me All of a Sudden? 4 Vet-Reviewed Reasons

Scottish fold cat very angry and aggressive

A cat usually hisses when they feel uncomfortable or threatened by something in their environment, either another cat, another animal, or even a human. Yes, it can even be their owner! But an occasional snub isn’t the same as your cat suddenly hissing at you whenever they see you, especially if they’re typically affectionate and cuddly.

Fortunately, this behavior is often caused by environmental, social, or physical factors, not a newfound disdain for you. But to solve the problem, you must figure out why your cat is hissing at you in the first place. Let’s dive in to see what vets say are the most common reasons that a cat might start hissing at their owner.

divider 3 paws

The 4 Reasons Your Cat Might Be Hissing at You Suddenly

1. Fear

A cat hisses usually as a reaction to an immediate situation. If your cat is suddenly hissing at you, they might feel fear about something in the environment, a change in your physical appearance, or your movements. Are you wearing a new hat? Are you moving differently? It is important to analyze what could potentially be causing your cat to feel afraid and to give the cat some space.

At this point, a cat might try to retrieve and hide but will potentially bite or snap in defense as a form of fear-induced aggression. It is best to retreat a step or two, discreetly observe the cat, and wait for them to calm down.

angry cat hissing
Image Credit: Fang_Y_M , Pixabay

2. Need for Space

Cats can also hiss at each other or toward other creatures in an attempt to establish boundaries and let the other one know it is time to back up.

If a cat has hissed at you, it is better to leave them alone and provide space. Discreetly observe your cat from a distance to try to examine their behavior and if there is something specific in the environment that is scaring them. During this time, avoid speaking or interacting with your cat. You should keep in mind that it is safer to leave the cat alone, but whenever this is not possible, protection such as a thick towel must be used to carefully handle the cat.


3. Introduction of a New Person or Animal

If you’ve just gotten a new cat, moved your spouse in, or even just had a friend over a few too many times for your cat’s comfort, they might start hissing at you. Whenever you are adding to the social environment of your cat, it is important to do gradual introductions and analyze the situation. If you can relate the sudden behavior of your cat hissing with bringing a new cat or person into their environment, it is time to make a physical separation for a while.

Once your cat has time to decompress, you can start to gradually introduce the two subjects. Short and positive introductions using food or treats as a reward for calm behavior and gradual approximations usually do the trick. A hissing and scared cat is not in a good mental state, so you, as the guardian and caretaker, should give your cat the time and experience they need to have a positive association with any addition to their social environment. If you would still experience issues with your cat, it is recommended to consult a veterinarian about training options.

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


4. Pain

The smoking gun for this one is whether your cat hisses at you all the time or only when you touch them in certain places or try to pick them up. If it’s the latter, your cat may be in pain. After all, touching a wounded body part rarely feels good.

Cats are exceptional at hiding their signs of illnesses. This biological drive protects them from opportunistic predators that might want to turn them into a tasty, easy-to-capture meal. While an indoor cat don’t suffer those same risks, they still have the biological drive to hide signs of illnesses. Your cat may not be forthcoming about their illness or injury and may only react when you touch them and make them hurt.

If you suspect that pain is the cause of your cat suddenly hissing at you, please visit the veterinarian soon. Since cats usually hide their pain and discomfort, by the time you notice that something is wrong, it is usually something that needs attention. Do not waste valuable time waiting to see if it passes.

Abyssinian cat hisses
Image Credit: Slava Dumchev, Shutterstock

divider 3 paws

Final Thoughts

It’s scary when our pets start acting out of the ordinary. Thankfully, this problem is typically resolvable without medical attention. The stressful lives led by cats worldwide cause most cases of atypical hissing.

However, if your cat only hisses when you touch them (not before you try, only once you come into physical contact), you’ll want to take your cat to the vet, since this is a sign that your cat is in pain and might need medical attention.


Featured Image Credit By: Anatoliy Cherkas, 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

2 Responses

  1. what about u get an adopted cat as I did had him almost 2 weeks. 1st few days he was hiding. but occasionally he let's me pet him and he would squirm around..act lovely and all.. but still remain hidden.. now recently he has hissed.. I figured he wanted space but still hissing. but what is weird if I slowly reach him, and start petting him, he is all playful and loving. then few hours later, he hisses again.. per kennel, he is healthy and gotten his shots.. am I doing something wrong or is it just the shy stage of new environment?

    1. Hi Daniel, thank you very much for sharing your story and for adopting a cat. Two weeks seems too short for your cat some will take longer to build trust, especially if they have a difficult background. Since the kennel confirmed that the cat is healthy, you should give him some time and continue working on building a trust-based relationship with him. Respecting their space is a great option at this point as making sure he feels safe is a must. If your problem persists, consider a video call with pangovet.com for additional and personalized advice.

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 Cats Eat Pomegranate? Vet-Reviewed Facts & FAQ

One of the fun parts of owning a cat is giving them treats now and again. Though we stick with cat treats most...

Do Cats Get Their Feelings Hurt? Causes & Cheering Them Up

Cats can get their feelings hurt. Most cats are interested in interacting with their owners and are sensitive to people, places, and activities...

An Owner’s Manual on Spaying or Neutering Your Cat: Why Not to Feel Guilt

Hi, I’m Dr. Lauren! Read my introduction to learn more about me and my two adventurous cats, Pancake and Tiller. Having your cat...

Why Don’t Cats Listen? 6 Vet-Verified Possible Reasons

​​ One of the many perks of dog ownership is the feeling of being listened to. “Sit,” “heel,” and “stay” commands bring satisfaction...

More related

IBS In Cats: Our Vet Explains Causes, Signs & Treatments

Irritable bowel syndrome—the name alone is enough to make you feel uncomfortable. Even if you’ve been fortunate enough to never experience the pain,...

National Microchipping Month 2025: When & What It Is

The facts of lost pets tell a sad tale. Roughly 15% of cat owners will lose their pet within 5 years. Outdoor felines...

Why Do Cats Like Hair Ties? 10 Vet-Approved Reasons

Have you ever wondered why cats seem to be so fascinated with your hair ties? It seems like they can’t resist the urge...

10 Best Slow Feed Cat Bowls in 2025: Reviews & Top Picks

Cats are quirky creatures, especially when it comes to eating. Some are super picky and seem to barely eat anything at mealtime. Others...

Keep reading

Canidae Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Canidae truly started as a labor of love. The company’s two founders, Scott Whipple and John Gordon, met in a pet food store owned by Whipple. The two men bonded over their love of animals and their dissatisfaction...

Canidae Cat Food Review

Can Cats Eat Chestnuts? Vet-Approved Diet Precautions & Advice

Do you have a furry friend at home and are curious if chestnuts are a safe snack for them? Wonder no more! Let’s explore whether cats can eat chestnuts and answer some other pressing questions about the safety of this...

Catster_Can Cats Eat Chestnuts_v1_Dec 4 2024

How to Tell If Cats Are Bonded: 6 Vet-Verified Signs to Look For

There is no doubt that cats are mystical creatures that often march to the beat of their own drum. Some felines prefer to be left completely alone, even shunning their humans, while others enjoy the pleasure of their owners’ company....

two cats side by side each other

Will a Male Cat Mate With a Female if She’s Not in Heat? Vet-Reviewed Feline Behavior Explanation

As cat parents, we know that female cats mate when in heat, but what about male cats? They don’t go into heat like females, so when do they mate? Will they mate with a female if she isn’t in heat?...

Black-and-white-Thai-cats-with-bell-collars

Are Tomato Plants Toxic to Cats? Vet-Reviewed Houseplants Examined

There’s nothing more exciting than welcoming a new cat into your life. Having a pet involves taking good care of it and buying the proper cat food, plenty of kitty litter, and some toys. If you plan on allowing your...

Catster_Are Tomato Plants Toxic to Cats

Can You Use Baby Shampoo on a Cat? Feline Shampoo Guide

Many cats don’t particularly enjoy being bathed, but sometimes it is necessary. Most cats never need shampooing, but if your cat has a skin condition that needs treating or has rolled in something that you need to clean off, you...

grey cat bath shampoo bubbles

Will a Mother Cat Abandon Her Kittens if I Touch Them? Vet-Reviewed Facts

Many of us have some version of this childhood memory: we come across a kitten or kittens in our yard or a park that seem to be on their own. Every adult around us has different ideas on how to...

Adorable little tabby newborn kitten sleeping in woman hands

Can a Cat Hear Better Than a Dog? Vet Approved Differences & Comparison

Cats and dogs often get compared to each other, and many people engage in heated debates to determine which pet is better than the other. When it comes to the arena of hearing, science has proven that cats generally have...

dog and cat checked by vet