Cat Abscess: Bite Wounds, Swelling and Treatment

If your cat has a warm, painful swelling or a wound that’s suddenly oozing smelly pus, they likely have an abscess. Cat abscesses are very common, especially in cats that go outdoors and get into fights. They usually need a vet’s care, but most cats recover quickly with treatment.

What is a cat abscess?

An abscess is a pocket of pus under the skin. Most cat abscesses start with a bite wound from another cat. Cats’ teeth are sharp and narrow, so bites make small punctures that close over quickly. Bacteria from the mouth get trapped under the skin and multiply, forming an abscess within a few days.

Common locations

Abscesses often form where cats bite each other during fights:

• The face, cheeks and neck
• The legs and paws
• The base of the tail and back end
• The shoulders and back

Mouth abscesses can also form from dental disease.

Signs of an abscess in cats

• A swelling that may feel soft, warm or firm
• Pain when touched
• Limping, if a leg is affected
• Fever
• Lethargy or hiding
• Loss of appetite
• A small scab or puncture wound
• Hair loss over the swelling
• A foul smell

Our articles on my cat is hiding and not eating and why your cat may be drooling explain other signs your cat may be unwell.

What if the abscess bursts?

Abscesses often rupture on their own, leaving an open wound that drains pus and blood. If this happens:

1. Gently clean the area with warm water or a saline solution.
2. Wear gloves, since the pus contains bacteria.
3. Don’t squeeze the wound.
4. Call your vet. A burst abscess still needs treatment to heal properly.

How do vets treat abscesses?

Treatment may include:

• Draining the abscess
• Flushing the wound to clean it out
• Placing a drain, for large abscesses
• Antibiotics prescribed by your vet
• Pain relief that’s safe for cats
• A cone to stop licking

Never give your cat human medicine or leftover antibiotics. Many human pain relievers are toxic to cats.

Cat abscess healing stages

With treatment, most abscesses heal within one to two weeks:

1. Draining: the wound may ooze for a few days
2. Shrinking: the swelling goes down and the wound starts to close
3. Healing: new skin and hair grow over the area

Call your vet if the swelling comes back, the wound gets bigger, or your cat stops eating.

Why testing matters after fights

Bite wounds can spread feline immunodeficiency virus (FIV) and feline leukemia virus (FeLV). Your vet may recommend testing a few weeks after a fight.

How to prevent abscesses

• Keep your cat indoors, or supervise outdoor time
• Neuter male cats, which reduces fighting
• Check your cat for wounds after time outside
• Keep vaccines up to date. Our article on the vaccination schedule every new pet parent needs explains which vaccines matter

Frequently asked questions

Can a cat abscess heal on its own?

Some drain and heal, but many need treatment to fully clear the infection.

Should I use a warm compress?

Your vet may recommend warm compresses to help drainage. Ask first.

Swelling or a wound? Ask a vet

Talk to a licensed vet 24/7, even on holidays, by chat, voice call or video call. Your first month is free with code FREEMONTH, then US $9.99/month, at NYPTeleVet.com. One membership covers up to 6 pets, and you can cancel anytime.

Our vets can’t prescribe medication, but they’ll tell you what’s likely needed and when an in-person visit is the next step.

Sources

• Abscesses in Cats, VCA Animal Hospitals
• Cat Bites and Abscesses, International Cat Care
• Cat Abscesses: What Are They, and How Do You Treat Them?, PetMD