Pet Care

Stress can make your cat sick

Stress Can Make Your Cat Sick – Here’s How

By Dr. Lee Wai Wai (DVM)

Cats hide stress well. By the time you see a problem, they may have been suffering for weeks. Unlike dogs, stressed cats get physically sick.

Here are the most common stress-related diseases I see in my clinic – and what you can do.

1. Bladder inflammation (FIC)

  • Signs: Straining to pee, blood in urine, crying in the litter box.
  • Emergency: If your male cat can’t pee, come immediately – it’s life-threatening.
  • Fix: Reduce stress, feed wet food, keep litter boxes clean.

2. Overgrooming (psychogenic alopecia)

  • Signs: Bald belly or legs, but skin looks normal.
  • Cause: Stress, boredom, or anxiety.
  • Fix: More playtime, cat trees, pheromone diffusers.

3. Peeing outside the litter box

  • Signs: Urine on beds, carpets, laundry.
  • Cause: Dirty box, new pet, moving home, or another cat bullying them.
  • Fix: One litter box per cat plus one extra. Scoop daily. Never punish.

4. Sneezing and eye infections (FHV-1 flare-ups)

  • Signs: Sudden sneezing, runny eyes after a stressful event (boarding, vet visit).
  • Cause: Stress reactivates a dormant virus.
  • Fix: Reduce stress, use pheromones during travel.

5. Vomiting or diarrhea

  • Signs: Chronic tummy issues with normal tests.
  • Cause: Stress affects the gut.
  • Fix: Calming supplements, routine, and sometimes medication.

When to call us

  • Straining to pee (emergency)
  • Overgrooming or bald spots
  • Litter box accidents
  • Hiding more than usual
  • Vomiting or diarrhea that doesn’t stop

A calm cat is a healthy cat. Let’s work together to find the stress source.

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