Lyme disease in cats – signs and vet treatment

Updated 2026-09-30 · 1 sources

Based on: PDSA

Book a vet visit

Book a vet appointment if you think your cat has this – a vet needs to confirm it and plan the treatment. Lyme disease is an infection caused by a bacteria called Borrelia.

What you can do now

  1. Contact your vet
  2. Note when it started, how often it happens and what else you see
  3. Take a photo or short video to show the vet
  4. Keep fresh water available
  5. Let your cat rest somewhere calm

Don't

  • Do not give any human medicine
  • Do not wait if it gets worse

What it is

Lyme disease is an infection caused by a bacteria called Borrelia and can be transmitted through tick bites.[1] If your cat shows signs of Lyme disease, book a vet appointment promptly, especially if you have recently found a tick on them.[1]

Signs

  • Limping and swollen joints
  • Fever or a high temperature
  • Lethargy or low energy
  • Swollen lymph nodes or glands
  • Reduced appetite
  • Nerve problems
  • Drinking and weeing more
  • A classic bulls-eye or target lesion is not usually seen

Causes and risk factors

  • Tick bites

How a vet finds out

  • A vet considers your cat’s symptoms
  • A vet considers your cat’s history of tick exposure
  • A vet may run a blood test

How vets treat it

  • Antibiotics
  • Anti-inflammatories
  • Pain relief
  • Hospitalisation
  • Medication

What the experts say

“Most cases of Lyme disease can be successfully treated with antibiotics and improvements are usually seen within 24-48hours of starting them. The course is usually several weeks long, and should always be finished to make sure all bacteria are killed.”

If your pet is struggling to breathe, has collapsed, is having a seizure or can't stand up: go to the nearest vet now.

Not sure how serious it is?

OkPaw asks a few quick questions about your pet and tells you in 30 seconds whether it can wait. Free on Google Play for Android.

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Common questions

What is Lyme disease?

Lyme disease is an infection caused by a bacteria called Borrelia.[1]

What signs can Lyme disease cause in cats?

Signs can include limping and swollen joints, fever, lethargy, swollen lymph nodes, reduced appetite, nerve problems, and drinking and weeing more.[1]

How will a vet diagnose Lyme disease?

A vet will consider your cat’s symptoms and history of tick exposure, and may run a blood test.[1]

Sources

  1. PDSA

How this page was made: written with the help of AI from the sources below, then checked claim by claim against those sources. Urgency levels follow OkPaw’s fixed safety rules. It is guidance, not a diagnosis. How we write our pages

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