Paw

Dog abscess

Abscesses in dogs are painful, swollen pockets of pus caused by bacterial infections, often resulting from injuries like bites or cuts.  

Their causes can be:  

  • Injuries  

  • Anal sacs issues  

  • Other infections such as internal abscess from organs   


Written by Dr. Mariella Roberts, Veterinary Surgeon, Animal Trust Vets CIC | Published May 2025 | Review date May 2027 | This advice is for UK pets only and is not a replacement for seeing a vet

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Symptoms  

  • Swelling or lump on the body, which may be painful  

  • Pus discharge, especially if the abscess bursts  

  • Fever  

  • Not eating or lethargy  

  • Pain or reluctance to move 

When to contact your vet

  • Visible signs of pain and infection  

  • Abscess near critical areas such as mouth or eyes  

  • General illness  

  • Abscess not healing or bursting  

Diagnosis

  • Physical exam by your vet and history 

  • FNA (needle inserted into lump to collect cells for examination)  

  • Culture and sensitivity to identify the bacteria 

Dog abscess treatment

  • Draining the abscess (lance it)  

  • Antibiotics  

  • Pain relief and anti-inflammatory  

  • Surgery if the abscess is caused by a foreign object like a grass seed or a tooth to be removed  

Prevention  

  • Supervise play to prevent bites  

  • Avoid hazards like stick or other objects  

  • Maintain good dental hygiene  

  • Manage anal glands issue with regular expression by your vet and fiber diet  

  • Maintain healthy weight  

  • Flea and tick prevention with regular products  

Outlook

With prompt and appropriate treatment, most abscesses in dogs have a good outlook and can heal completely. However, some abscesses, particularly internal ones or those left untreated, can be serious and even life-threatening. Prompt veterinary attention is crucial for diagnosis and treatment.