TL;DR: Feline hot spots are painful, rapidly spreading skin infections that require a veterinary examination within 24 hours to break the itch-scratch cycle and prevent further tissue damage.
What exactly is a feline hot spot and how does it affect my cat?
A hot spot, clinically known as acute moist dermatitis, is a localized area of skin inflammation and bacterial infection. On a cat's hip, these typically present with the following characteristics:
- Raw, red, and oozing patches of skin
- Extreme sensitivity or pain to the touch
- Rapid development due to self-trauma (licking or chewing)
- Triggers including allergies, flea bites, or underlying joint discomfort
Is a hot spot on my cat considered a veterinary emergency?
The urgency level for a hot spot is Medium. While rarely life-threatening, it requires prompt attention for the following reasons:
- Hot spots are very painful and can spread significantly within just a few hours.
- You should schedule a veterinary visit within 24 hours if the area is spreading, smells foul, or if your cat is acting lethargic.
- Medical intervention is necessary to stop the cycle of self-mutilation and prevent deeper, more systemic infections.
Why should I provide a photo of my cat’s hot spot for triage?
Providing a clear, well-lit photo of the affected area is incredibly beneficial for triage. A visual assessment allows a veterinary professional to perform the following checks:
- Evaluate the size of the lesion and the severity of tissue inflammation.
- Identify potential signs of parasites or underlying abscesses.
- Determine the appropriate timeline for an in-person examination.
- Decide if immediate home-care steps, such as placing an Elizabethan collar (cone), are necessary before you arrive at the clinic.
Clinical Context (Merck Veterinary Manual)
While the provided text excerpts do not directly address "hot spots" (pyotraumatic dermatitis) specifically located on the hips of cats, they do offer information on feline pyoderma, which can manifest similarly. Superficial pyoderma in cats often presents with scaling, particularly over the lumbosacral area, with scales pierced by hairs. Intact pustules are rarely found. Deep pyodermas can present with alopecia, ulcerations, hemorrhagic crusts, and draining tracts; eosinophilic plaques may also be present secondary to allergic disease. Feline pyoderma is commonly associated with allergic skin diseases, parasitic diseases, and feline chin acne. Recurrent, non-healing deep pyoderma can be associated with systemic diseases, such as feline immunodeficiency virus, feline leukemia virus, or atypical mycobacteria. Diagnosis of superficial pyoderma is based on clinical signs like hair loss, scaling, erythema, papules, pustules, and epidermal collarettes.
Chapter: Dermatology
Source: The Merck Veterinary Manual, 11th Edition (Page 864)