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.

9 Most Common Illnesses & Diseases in Cats: Our Vet Answers

Share

veterinarian doctor holds cat

Cats are masters at hiding signs of illness, no matter what age they are. So, it is important to have an understanding of the common illnesses and diseases these wonderful creatures may face—as a little knowledge goes a long way in potentially helping to recognize a disease or illness, before it becomes too much of a problem!

The types of issues that can cause cats problems do vary a bit, depending on the age of a cat, which can include issues with the urinary tract, teeth, obesity, and more.

Some of these illnesses you may not even have considered being a feline problem, such as high blood pressure. But believe it or not, cats can get high blood pressure, just like people! The following is a list of the more common illnesses and diseases that can impact our pet cats. Read on to learn more.

divider 1 paws

The 9 Most Common Illnesses & Diseases in Cats

1. Chronic Kidney Disease

Cats originated in the desert, where water conservation is critical to survival. Therefore, their kidneys are highly efficient at conserving water, which is one of the reasons many people don’t see their cats at the water bowl very often.

However, as with any living being that ages, their organ systems also age and become less efficient over time—the kidneys are no different. Add to this that the kidneys work to remove many toxins and harmful cellular byproducts from the bloodstream, making them fairly susceptible to damage. Kidney damage is even more likely if concurrent issues are peasant in the urinary tract, such as dehydration or blockages.

Chronic kidney disease itself is an umbrella term that loosely describes a decrease in the function of one or both kidneys. It does not specifically refer to what caused the damage—just that there is some impairment in how efficient the kidneys are at filtering the bloodstream and creating urine.

Many different clinical signs can be seen in cats that experience chronic kidney disease, including vomiting or nausea, loss of appetite, large or frequent urinations, weight loss, or poor haircoats. Chronic kidney disease can often be managed with medications at home, but once it develops, it is not reversible.

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!

Preventative wellness PGV mention keep cat healthy Preventative wellness PGV mention keep cat healthy mobile


2. Parasites

Many cats will be exposed to some form of parasites at some point in their lives. One of the more common parasites found in cats is fleas—even in indoor-only cats, believe it or not! And, if you didn’t know, fleas can carry a certain type of tapeworm, which means if a cat has fleas, there’s also a good chance they have tapeworms. The good news is that both of these issues tend to be quite treatable with the right approach.

For cats that start life as strays, therefore needing to catch their own food, this can expose them to intestinal parasites, such as roundworms, or protozoans like toxoplasma. Both of these can cause issues later in life, though thankfully, this tends to be rare. Parasites are often treated with a round (or two or three) of deworming. In the case of fleas, topical medications may be prescribed to treat the infestation.


3. Dental Disease

Dental disease is easily one of the most, if not the most, common disease vets see in young cats. Often starting around 5 years of age (though it can be as young as 2 or 3 years of age), cats can develop cavities, inflammation of their gums (gingivitis), and tartar buildup.

The good news, for those that are inclined to do-it-yourself, is that daily brushing of a cat’s teeth can help reduce tartar buildup. But remember that human toothpaste is toxic to pets, so use one designed for cats if you plan to do this!

The bad news, however, is that it doesn’t help to prevent cavities—as cavities for cats start inside the tooth and work their way out, destroying the tooth in the process. Once this happens, the only treatment is a dental procedure that involves extracting the affected teeth.

Other types of dental disease seen in cats can include fractured teeth, commonly in the tips of the fangs, or in the canines. But don’t worry—it is possible to do a root canal in a cat’s canine to fix the fracture in many cases!

close up examining cat's mouth with swollen gums
Image Credit: mojahata, Shutterstock

4. High Blood Pressure (Hypertension)

It’s not only people that can have high blood pressure; cats have become more and more frequently diagnosed with hypertension—the medical term for high blood pressure. Although it doesn’t seem to be connected to cholesterol levels in cats, unlike in humans, it can develop as a stand-alone issue, or as a secondary to other diseases, such as chronic kidney disease. Hypertension tends to be more of a problem in cats as they get older. Just like with people, it is treated with blood pressure medication, and regular checkups.


5. Obesity

Another similarity to humans, is that many adult pet cats are increasingly having trouble with being overweight, or just plain obese. And just like with people, this can lead to other concerns, including arthritis, insulin resistance and diabetes, and a host of other issues.

Many vets think that overfeeding, especially with treats and dry food, along with a combination of an indoor low-activity lifestyle, directly leads to obesity in pet cats. Therefore, feeding wet foods and encouraging daily exercise (cat running wheel, anyone?) can be key components in staying ahead of this illness.

Cat Body Condition Score Healthy Weight
You are free to use this image but we do require you to link back to Catster.com for credit

6. Weight Loss

Conversely, as cats become seniors, one of the more common illnesses seen is weight loss. Weight loss is not specific for any particular disease, but rather, a sign that something else more concerning is occurring. It is never normal for a cat to be “just losing weight”. If you see weight loss in your cat, it is definitely time to get them a checkup with their vet.


7. Abscess

Cats that go outside and encounter other animals, especially other cats, are at risk of getting in fights. While they may not always be the cat that starts the fight, any cat bite can lead to an infection called a cat fight abscess. These are basically pockets of infection that occur under the skin, within the region of a bite wound. They are caused by the bacteria in the cat’s mouth, which can infect the underlying tissues when teeth penetrate the skin.

Cats that are the instigators of such fights tend to develop abscesses around their head and shoulders, while cats that are trying to escape from such fights tend to get these abscesses around their hind end. Regardless, abscesses tend to be more of a nuisance than something of concern, as most are quite treatable with antibiotics prescribed from your vet. Sometimes, a very deep abscess will also need to be surgically drained.

thin cat with yellow eyes
Image Credit: Anastasiya Tsiasemnikava, Shutterstock

8. Inappropriate Urination

One of the most common illnesses seen in cats of all ages is inappropriate urination. This is another issue that describes more of a clinical sign than an actual single disease process. Inappropriate urination is defined as “the act of urinating outside the litter box.” It can be around the house, on walls, or on horizontal surfaces such as furniture, clothes, or beds.

Inappropriate urination can be caused by many different issues, which can vary depending on the age of the cat. However, some of the more common reasons that a cat may experience inappropriate urination include:

  • Urinary tract infections
  • Urinary crystals or stones
  • Poor litterbox husbandry
  • Urine marking or spraying (especially in intact male cats!)
  • Behavioral or stress

Treatments will vary depending on the underlying cause.


9. Vomiting

Vomiting in cats is a common reason that they present to the vet. Sometimes, there are other clinical signs as well, including weight loss, diarrhea, or a change in appetite. Vomiting is another feline issue that isn’t a specific disease, but rather, an illness that can indicate other concerns. Some of the diseases that can cause vomiting in cats include:

You are free to use this image but we do require you to link back to Catster.com for credit

divider 1 paws

If I Think My Cat Isn’t Well, What Should I Do?

If you think your cat may be experiencing any of the above, the next step is often a trip to see their vet. Your vet will generally start with a history, and a physical exam. Depending on what is found during the exam, next steps may include x-rays and/or stool or blood samples to investigate abnormalities.

How Can I Prevent Illness in My Cat?

Routine vet visits are key for catching illness and disease early in cats. Follow your vet’s recommendations as to whether your cat needs to be seen annually or more frequently.

However, there can be easy things to do at home to complement your cat’s health between their vet visits. Purchasing a scale to monitor their weight can alert you to early changes that might herald concerns. Ensuring they eat a healthy, balanced diet is also helpful.

One easy trick that might alert you to early changes in your cat’s health is closely monitoring the litterbox. If you see sudden changes to the size or number of urine or fecal clumps, that can be an early indication of issues with the urinary or GI tracts, which often means it’s time for a vet visit.

divider 1 paws

Conclusion

Knowing about the most common illnesses and diseases in cats can certainly be helpful when it comes to recognizing them in your own feline friend. If you do have concerns that any of these might be affecting your cat, the next step is to reach out to your vet for further guidance.

Read Also:


Featured Image Credit: H_Ko, 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

Ask Dr. Paola – Help! My Cat Suddenly Has Dandruff! (March 30, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Your Cat Keeps Vomiting After Eating: Here’s What’s Going On

Cats vomit. It’s one of the less glamorous facts of life with a feline, and most cat owners have cleaned up more than...

Ask Dr. Paola – Help! My Cat Gets Diarrhea from Wet Food! (March 23, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Cat Shampoo Alternatives That Are Already in Your House

If your cat has ever gotten into something disgusting and you’ve found yourself without cat shampoo, we’re here to help. Before you panic...

More related

Activated Charcoal for Cats: Our Vet Discusses Benefits and Risks

If you’ve ever had to bring your dog or cat to the vet for eating something potentially dangerous, you may have taken home...

10 Pet-Friendly Hotels in Dothan, AL (2026 Guide)

Sometimes, you have to travel, whether for vacation or work, but traveling on your own can be lonely. So why not bring your...

Tortoiseshell Norwegian Forest Cat: Info, Facts, Pictures & History

The Norwegian Forest Cat is a stunning sight, with lush, gorgeous coats and a majestic gaze. What makes these cats even more spectacular...

10 Pet-Friendly Hotels in Pigeon Forge, Tennessee (2026 Update)

Pigeon Forge, TN is a very popular vacation spot. There are tons of hotels in the area due to the high number of...

Keep reading

Can Cats Eat Cactus? Vet-Approved Facts & FAQ

Cats are curious creatures, so it’s no surprise that they get into things that they shouldn’t from time to time. But what do you do if they get into a cactus, and should you be worried? While cacti aren’t usually...

Can Cats Eat Cactus

8 Best Cat Treats in Australia in 2026 – Reviews & Top Picks

Sometimes, we need to give our kitties a good reward—whether that be for a job well done or simply appreciation. It connects and bonds our felines to us, creating a safe environment with lots of perks. So, if you live...

maine coon cat having treat

Is It True That All Cats Have Tails? Vet-Reviewed Facts

A tail is a vital part of a cat’s physique and helps them balance, capture prey, and communicate with humans and other felines. For these reasons, you might think that all cats have tails, but this isn’t the case. Some...

feral cats resting outdoor

Can Cats Eat Frogs? Vet-Reviewed Safety Facts

If you have a rambunctious feline with a strong prey drive, you have likely come across them playing with something strange or unsavory. Cats are incredible hunters, and they will hunt almost anything smaller than themselves. In many climates, that...

Can Cats Eat Frogs

How Long Can a Cat Go Without Pooping? Vet-Verified Causes & Solutions

Cats are extremely routine-based animals, and if you watch them long enough, you will notice that they do certain things at the same time each day and can be accurate even down to the minute. This is so true that...

woman-teaching-cat-to-uese-litter-box

Can Cats Eat Spaghetti? Vet Reviewed Facts To Know!

It’s totally normal for loving pet owners to want to share their favorite foods with their feline companions. In many cases, this is a relatively harmless practice, though sometimes, it can be quite detrimental to your cat’s health. Spaghetti isn’t...

Can Cats Eat Spaghetti

6 DIY Cat Popsicle Recipes (Vet-Approved)

Popsicles are tasty treats, but they’re usually not safe for cats to eat because they can contain added sugar, artificial colors, and other unhealthy ingredients for cats. Fortunately, you don’t have to feel bad every time you decide to unwrap...

blue tabby maine coon cat licking homemade ice cream treat popsicle

Pregnant Cat Nipples vs Normal: Vet-Verified Differences Explained

Both male and female cats have nipples, but the female’s nipples will change during and after pregnancy to accommodate the nutritional needs of her little ones. After all, those nipples must be ready to feed several kittens at the same...

male hand touching the pregnant bacl and white cat's belly

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.