A healthy cat being examined by a veterinarian, showcasing common cat illnesses, symptoms, and treatment options.

Common Cat Illnesses, Symptoms & Treatments (Vet-Reviewed)

Pet HealthPublished Jul 7, 2025Updated Oct 20, 2025
Dial A VetBy Dial A Vet

Discover common cat illnesses, their symptoms, and effective treatments in this vet-reviewed guide. Keep your feline friend healthy with expert insights!

Is your cat acting differently lately? Cats are masters at hiding illness, so even subtle changes in behavior, appetite, or energy levels can signal a health issue. As a cat owner, knowing the signs of common illnesses and how to respond is vital to keeping your feline friend happy and healthy.

😿 Upper Respiratory Infections (URIs) in Cats

Upper respiratory infections (URIs) are among the most common illnesses in cats, especially in shelters or multi-cat households. These infections are often caused by viruses like feline herpesvirus or calicivirus, though bacteria can also play a role.

Symptoms of a URI include:

  • Frequent sneezing
  • Nasal discharge (clear or colored)
  • Watery or red eyes
  • Loss of appetite
  • Lethargy

If your cat shows these signs, consult a vet. Mild URIs can be managed with supportive care like hydration and nutritional support, but severe cases may require antibiotics or antiviral medication. Ensure your cat stays hydrated and eats, as dehydration and malnutrition can worsen the condition.

Vaccinating your cat against feline herpesvirus and calicivirus can help prevent URIs, especially if your cat interacts with others.

🐾 Feline Lower Urinary Tract Disease (FLUTD)

Feline Lower Urinary Tract Disease (FLUTD) is a group of conditions affecting a cat's bladder or urethra. It’s more common in middle-aged, overweight cats or those on a low-moisture diet. Stress and dehydration can also contribute to FLUTD.

Symptoms of FLUTD include:

  • Straining to urinate
  • Frequent trips to the litter box with little output
  • Blood in urine
  • Crying or vocalizing during urination
  • Urinating outside the litter box

A blockage in male cats can be life-threatening, so immediate veterinary care is essential if your cat cannot urinate. Treatment may include fluid therapy, medication to relieve inflammation, or even surgery in severe cases. To prevent FLUTD, encourage your cat to drink more water by offering a water fountain or feeding wet food.

🤢 Vomiting and Diarrhea

Occasional vomiting or diarrhea is common in cats, but persistent symptoms can indicate an underlying issue. Causes range from dietary indiscretion (eating something inappropriate) to serious conditions like inflammatory bowel disease or parasites.

Common symptoms include:

  • Frequent vomiting
  • Loose or watery stools
  • Dehydration
  • Loss of appetite
  • Lethargy

If your cat’s vomiting or diarrhea lasts more than 24–48 hours, consult a vet. They may recommend diagnostic tests to identify the cause. Treatment often involves dietary changes, anti-nausea medication, or parasite control if needed.

To minimize risks, keep toxic foods like chocolate and onions out of reach, and ensure your cat is up-to-date on parasite prevention.

😔 Dental Disease in Cats

Dental disease is a silent but serious issue for many cats. Plaque buildup can lead to gingivitis, periodontal disease, and even tooth loss if untreated. Cats are skilled at masking pain, so owners often overlook dental issues until they become severe.

Signs of dental disease include:

  • Bad breath
  • Drooling
  • Difficulty eating or chewing
  • Red or bleeding gums
  • Pawing at the mouth

Annual dental check-ups and cleanings are essential. At home, brush your cat’s teeth with feline-safe toothpaste and provide dental treats or toys to reduce plaque buildup.

🐈‍⬛ Feline Obesity

Obesity is a growing problem in cats and can lead to various health issues, including diabetes, joint problems, and heart disease. It’s often caused by overfeeding and lack of exercise.

Signs of obesity include:

  • Excess body weight (20% above ideal weight)
  • Difficulty grooming
  • Reduced activity or playfulness
  • Visible fat deposits

Work with your vet to create a weight-loss plan that includes portion control, a balanced diet, and increased activity. Puzzle feeders and interactive toys can help stimulate your cat while controlling calorie intake.

🩺 When to See a Vet

It’s always better to err on the side of caution when it comes to your cat’s health. Contact a vet if you notice:

  • Persistent changes in behavior or appetite
  • Signs of pain, such as hiding or vocalizing
  • Unexplained weight loss
  • Difficulty breathing
  • Prolonged vomiting or diarrhea

Early intervention can prevent minor issues from becoming major problems, so don’t hesitate to reach out to a veterinary professional.

FAQs

Q: How can I tell if my cat is sick?

A: Look for changes in behavior, appetite, grooming habits, or litter box usage. Cats often hide illness, so subtle signs matter.

Q: Can I treat my cat’s illness at home?

A: Mild issues like a minor URI may improve with supportive care, but always consult a vet to rule out serious conditions.

Q: What are the most common cat illnesses?

A: URIs, FLUTD, dental disease, obesity, and gastrointestinal issues are among the most common health problems in cats.

Q: How do I prevent my cat from getting sick?

A: Keep your cat vaccinated, maintain a balanced diet, provide clean water, and schedule regular vet check-ups.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

Related articles

Next available appointment

Loading…
FREE
Dial A Vet assistant

Vet Assistant Available

Worried? Chat for Free instantly →