TL;DR: Scrotal swelling in cats is typically caused by infection or trauma and requires a veterinary evaluation within 24 to 48 hours. Seek immediate emergency care if your cat is lethargic, refusing to eat, or unable to urinate.
What could be causing swelling and redness in my cat's scrotal area?
Swelling and redness in the scrotal or testicular area of a male cat can be caused by several underlying issues. The most common causes are orchitis (inflammation of the testicles) and epididymitis (inflammation of the tube that stores sperm). These are often the result of bacterial infections, which can occur after a cat is bitten or scratched in that area during a fight. Other possibilities include localized trauma, insect stings, or, less commonly, testicular tumors.
Is my cat's scrotal swelling a veterinary emergency?
- This condition is classified as Medium Urgency; while not typically a life-threatening emergency, it is extremely painful and can lead to systemic infection.
- You should aim to have your cat evaluated by a veterinarian within 24 to 48 hours.
- Seek care immediately if your cat is also lethargic, refusing to eat, or unable to urinate.
How does sharing a photo help with my cat's veterinary triage?
- A clear photograph allows the professional to assess the extent of the inflammation and look for signs of a draining abscess or puncture wounds.
- Visuals help the triage team determine if the skin integrity is compromised.
- This information helps the clinic prioritize your cat's appointment and prepares the medical team for the specific type of care your pet will need upon arrival.
Clinical Context (Merck Veterinary Manual)
In male cats, orchitis and epididymitis, characterized by pain and swelling of the testes, epididymides, and/or scrotum, are rare unless due to trauma. Careful palpation of the scrotal contents is essential to identify the involved structures, although patient discomfort and edema can hinder this process. Ultrasonography, with sedation or analgesia, is helpful for further evaluation and to confirm testicular torsion or focal lesions. Application of cool water packs can help decrease testicular damage caused by local swelling and hyperthermia, taking care not to damage the scrotal skin. If bacterial cultures are positive, appropriate systemic antibiotics with good prostatic penetration are indicated. If future reproduction is not of importance, castration is the treatment of choice for orchitis and epididymitis due to any cause.
Chapter: Urology, Infectious Disease, Surgery
Source: The Merck Veterinary Manual, 11th Edition (Page 1400)