Cat bite abscess in cats – signs and treatment

Updated 2026-09-30 · 2 sources

Based on: PDSA, International Cat Care (iCatCare)

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. It is a painful swelling that can form after a cat has been bitten or scratched.

What to do now

What you can do now

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

Don't

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

What it is

A cat bite abscess can form after a cat has been bitten or scratched and may be painful.^[1] Cat bite abscesses are most common on the tail, top of the head, legs, face and neck.^[1] If an abscess bursts, it may show pus and have a bad smell.^[2]

Signs

Limping, especially if a leg was bitten
Lethargy or tiredness
Reduced appetite
Fever or a high temperature
A hot, painful affected area
Swelling
Redness
Pus or a bad smell if it bursts
Bite marks or a large wound if it bursts
A floppy tail

Causes and risk factors

Being bitten or scratched
Fighting with another cat
Territorial behaviour
Being an unneutered male cat

How vets treat it

Lancing the abscess to release pus
Draining the abscess
Flushing the abscess until clean
Anti-inflammatories to reduce pain and inflammation or help your cat feel more comfortable
Antibiotics for the infection, if your vet advises them
Treatment based on how your cat is and how severe the wound is

What the experts say

“A reduced appetite ; Low energy (lethargy) ; Fever ; Swelling ; Redness ; Wounds (bite marks/a large wound if the abscess has burst) ; A floppy tail ; Limping ; Pain”
— PDSA [1]

“Limping, if bitten on one of the legs ; Lethargy/tiredness ; Reduced appetite ; High temperature/fever ; The affected area may be hot to the touch and painful ; Swelling ; Redness ; If it bursts, you will see pus and may notice a bad smell”
— International Cat Care (iCatCare) [2]

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?

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Common questions

What signs can a cat bite abscess cause?

Signs can include swelling, redness, pain, lethargy, reduced appetite, fever and limping; if it bursts, you may see pus or notice a bad smell.^[1]^[2]

How might a vet treat a cat bite abscess?

A vet may lance, drain and flush the abscess, and may use anti-inflammatories or antibiotics depending on your cat and the wound.

Where are cat bite abscesses most common?

They are most common on the tail, top of the head, legs, face and neck.^[1]

Sources

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