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 So Hyper All of a Sudden: 8 Possible Reasons (Vet Reviewed)

Written by: Christian Adams

Last Updated on February 19, 2024 by Catster Editorial Team

cream tabby maine coon cat playing water

Why Is My Cat So Hyper All of a Sudden: 8 Possible Reasons (Vet Reviewed)


Dr. Paola Cuevas Photo


Dr. Paola Cuevas

MVZ (Veterinarian)

The information is current and up-to-date in accordance with the latest veterinarian research.

Learn more »

For some cats, it isn’t rare that they will have a moment of wildness and suddenly charge around the house. For others, it can be a surprising and sudden occurrence. While it might simply be a case of your cat burning off energy, there are, in fact, many reasons that your feline friend might suddenly become hyper. Here are eight possible causes for this behavior, as well as some advice on what you can do to help curb their enthusiasm and potentially quieten them down or change their habits to better suit the whole family.

3 cat divider

The 8 Reasons Why Your Cat Is Suddenly Hyper

1. Not Enough Activity

When they’re not sleeping, which they will do for around 16 hours a day, cats are basically large balls of pent-up energy. That energy needs to go somewhere. If you regularly play with your cat or they are able to get outside and burn off this energy themselves, you may not see any incidents of unexpected or unexplained hyperactivity. If possible and if safe, let your cat out to play. Alternatively, get interactive toys, and spend some time every day playing with your cat. It will enhance your bond and keep their mind active, and it may prevent them from charging around the house in the middle of the night.

Playing is an important part of keeping your cat mentally and physically engaged, and a great toy will make it much easier. We like Hepper's Catnip Stick Toys because they're sturdy enough to handle intense play and completely filled with organic catnip. You'll love the fun range of pastel colors and your cat will enjoy the prey-like shape!

Hepper Stick Catnip Cat Kicker Toy
  • No Filler - Like all the best cat toys our is stuffed with 100% organic catnip. Cheap cat toys with...
  • Flexible Play - Simple plush shape is great for biting, scratching and pawing. It can start life as...
  • Durably Designed - Our cat safe toys are hand-stitched with a double-lined exterior construction for...

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

2. Boredom

Playing with your cat can also help alleviate boredom. Cats need mental stimulation as well as physical stimulation, which is why interactive toys are such a good idea. Alternatively, try hiding toys around the house, and have your cat go find them. Change toys frequently. You can even keep a rotating supply of toys so that once your cat gets bored of a toy, you can put it away and take it out again in a few months.

yellow cat playing piano
Image Credit by: amenic181, Shutterstock

3. Illness

While a lot of illnesses and health conditions can cause your cat to be lethargic and see them sleep even more of the day away, there are some conditions that will have the opposite effect. Conditions like hyperthyroidism can cause an increase in energy. In the case of hyperthyroidism, the thyroid produces more hormones than usual, and an excess level of the thyroid hormone can lead to your cat having more energy that needs burning off.

4. Fleas

Feline zoomies may not be a case of using up excess or natural energy levels but as a reaction to flea bites. This is especially true if your cat is hypersensitive to bites. Whenever they get bitten, it will be painful and cause discomfort. Your cat is effectively running it off, trying to distance themselves from the cause of the pain.

Cat with fleas
Image Credit by: Maja Marjanovic, Shutterstock

5. Cognitive Decline

Like humans and most other animals, cats can suffer cognitive decline, and this may present in any of several ways. Some cats sleep more, some become aggressive, and others may struggle to perform simple tasks. It can also cause your cat to become restless, which is especially pronounced at night simply because the house is quiet, and you can hear them more easily. Essentially, your cat is confused, and their natural instinct is to run and charge around.

6. Fear or Anxiety

Although more common in your kittens, fear and anxiety can be a cause of hyperactivity in adult and older cats too. Cats are both predators and prey,  and if something startles them, they will decide whether to stay and fight or to run away. Your cat running through the house might be a sign that some stimuli have caused them to run in fear in the hope of getting away.

scared British blue-point cat hiding under the bed
Image Credit by: Zossia, Shutterstock

7. Overstimulation

Hyperactivity can present itself in a number of ways. As well as moments of increased physical activity and exertion, it can also lead to aggression and acting out. One possible cause of these problems is overstimulation. If your cat has spent a lot of time on your lap being stroked or petted and then seemingly suddenly turns on you, they may have had enough of being petted. Typical signs include a twitching tail and moving their mouth toward the source of the overstimulation.

8. Natural Energy

Cats naturally have long periods of rest with brief periods of high-intensity energy. It is how they live in the wild and how they have evolved. It’s also how they live even now that they are domesticated pets living as part of our families. Your cat may simply be running around because it’s time for them to be awake and they are naturally using their energy stores.

cat jumps and plays with a rope and an elastic band
Image Credit by: ketlit, Shutterstock

cat + line divider


All cats are different, and while some owners are accustomed to their cats having 10 minutes of madness while charging around the house and bouncing off walls, other owners are less accustomed to these seeming outbursts. If your cat is showing signs of hyperactivity and you aren’t used to seeing this kind of activity from them, look for possible causes as listed here. Ensure that they are being physically and mentally stimulated, that nothing is causing them fear or anxiety, and that they have a healthy outlet for their natural energy. Check for fleas, and look for other signs of possible health issues.

Featured Image Credit: Nils Jacobi, Shutterstock

Get Catster in your inbox!

Stay informed! Get tips and exclusive deals.
Catster Editors Choice Badge
Shopping Cart


© Pangolia Pte. Ltd. All rights reserved.