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Cat Health

7 Signs Of Hyperthyroidism In Cats

If your cat's thyroid gland is overactive, you may notice these changes in their behavior, energy, and appearance.

Marisa Taylor KarasGhanasyam Bey, DVM
Written by Marisa Taylor Karas | Reviewed by Ghanasyam Bey, DVM
Updated on May 1, 2025
Reviewed by Ghanasyam Bey, DVM | May 1, 2025

As cats age, one of the most common conditions that develops is hyperthyroidism, which is when a cat has elevated hormone levels. This can increase their metabolism, thirst, and weight loss. Hyperthyroidism can be managed by several different treatments.  In this video, learn the signs of hyperthyroidism in cats and when to see a veterinarian.

You can read more about hyperthyroidism in cats and how it’s treated here.

References

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Marisa Taylor Karas is a freelance journalist based in Brooklyn who has covered health, gender, and technology for 15 years. She previously worked at The Wall Street Journal, The Guardian, and Al Jazeera America, among other publications, and also served as managing editor of the Mellon Foundation in New York City.
Ghanasyam Bey, DVM
Reviewed by:
Ghanasyam Bey, DVM
Ghanasyam Bey, DVM, is from Cleveland, Ohio, and attended Princeton University for undergraduate studies. After a year of biology research at Duke University, he attended Ohio State College of Veterinary Medicine.

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