TL;DR: Hard bumps on a cat's head are typically benign cysts or skin tags and rarely require emergency care unless they change rapidly. Monitor the growth, take photos, and schedule a routine veterinary exam for identification.
What are common types of hard, wart-like growths found on a cat's head?
- Sebaceous cysts, which are clogged oil glands.
- Cutaneous horns, which are small buildups of keratin.
- Common benign skin tags.
- Feline papilloma virus, which causes actual warts primarily in older or immunocompromised cats.
Is a hard, non-painful growth on my cat's head a medical emergency?
- Assess the urgency: Most hard, non-painful growths are considered a low priority.
- Monitor for stability: If the bump is not bleeding, oozing, or itchy, it is typically not an emergency.
- Schedule a routine exam: Have your veterinarian identify the mass during a standard appointment.
- Watch for rapid changes: Seek care sooner if the growth changes shape, size, or color to rule out conditions like basal cell tumors.
How does taking photos of the growth help my veterinarian?
- Assists in triage: Clear photos allow vets to examine texture and attachment points before the clinic visit.
- Provides a baseline: Photos allow you to accurately track if the growth is enlarging or changing over time.
- Determines next steps: This visual history provides critical information your vet needs to decide if a biopsy is necessary.
Clinical Context (Merck Veterinary Manual)
In cats, hard wart-like growths on the head may be associated with dilated pores of Winer, which are rare, benign hair-follicle neoplasms recognized in aged cats, appearing as solitary, dome-shaped lesions resembling a giant comedo with compact keratin protruding through the surface. Feline basal cell tumors, which can develop almost anywhere on the body but commonly on the head, may also present as firm, solitary, encapsulated, and potentially hairless or ulcerated nodules. While basal cell tumors are typically benign, they can be expansive and cause ulceration. Less commonly, the lesions may be caused by virally induced plaques and papules, which may progress into an invasive carcinoma. Complete excision is curative for dilated pores of Winer.
Chapter: Dermatology, Oncology
Source: The Merck Veterinary Manual, 11th Edition (Page 947)