TL;DR: A swollen, oozing lump on your cat's cheek is likely a facial abscess, a high-urgency condition requiring veterinary attention within 24 hours to manage pain and prevent life-threatening infection.
What causes a swollen, oozing lump on my cat’s cheek?
A swollen, painful lump on a cat's cheek that is oozing pus is most commonly a facial abscess. This typically occurs when bacteria are introduced under the skin via a bite wound or scratch from another animal, or due to a severe dental infection. The body responds by creating a pocket of infection that eventually ruptures to drain the trapped fluid.
Is my cat’s facial swelling a medical emergency?
- Urgency: High. An abscess is a sign of a significant infection.
- Pain & Fever: These infections cause high levels of pain and can lead to a fever.
- Sepsis Risk: If the infection spreads to the bloodstream, it can become life-threatening.
- Recommended Action: Contact your veterinarian within 24 hours for professional cleaning, lancing, and antibiotic treatment.
How does sending a photo help triage my cat?
- Allows a veterinary professional to assess the severity of the wound and discharge.
- Helps differentiate between a simple skin infection, a dental-related issue, or a more serious condition involving the eye or jaw.
- Enables the triage team to determine how quickly your cat needs to be seen based on the color and consistency of the pus.
Clinical Context (Merck Veterinary Manual)
If a cat presents with a swollen lump oozing pus on the cheek, differentials include abscesses of the salivary glands (parotid, mandibular, or zygomatic), plague (Yersinia pestis), Cuterebra larval migration, or a foreign body reaction. Zygomatic gland abscesses are acutely painful and located just caudal to the eye, potentially causing retrobulbar swelling, divergent strabismus, exophthalmos, excess tearing, and reluctance to open the mouth. Plague can manifest as a draining, abscessed lymph node, particularly the submandibular lymph node, which may be bilaterally enlarged; other signs include oral ulcers, skin abscesses, ocular discharge, diarrhea, vomiting, and cellulitis. Cuterebra lesions are most common in the summer and fall and appear as fistulous swellings typically around the head, where purulent material may exude; affected cats often groom the area aggressively.
Chapter: Infectious Diseases, Surgery, Dentistry
Source: The Merck Veterinary Manual, 11th Edition (Page 369)