TL;DR: A dog with a hot, swollen scrotum requires immediate veterinary care to rule out life-threatening conditions like testicular torsion or severe infection. Seek emergency medical attention to prevent permanent tissue damage and manage extreme pain.
What causes my dog's scrotum to be hot and swollen?
Finding that your dog's scrotum is hot to the touch and visibly swollen can be very distressing. This condition, often accompanied by redness and pain, usually indicates significant inflammation or a vascular issue within the scrotal sac. Common causes include orchitis (infection of the testicles), epididymitis, trauma, or a rare but critical condition called testicular torsion.
Is a hot, swollen scrotum in a dog a veterinary emergency?
- The urgency level for a hot, swollen scrotum is considered High.
- If the cause is testicular torsion, the spermatic cord twists and cuts off blood supply, causing tissue death, extreme pain, and systemic illness within hours.
- Infections can escalate quickly due to the proximity to the reproductive and urinary systems.
- You should contact an emergency veterinarian or your primary clinic immediately for a physical examination.
How does sending a photo help the vet triage my dog's condition?
- A visual assessment allows the triage team to look for specific "red flags" such as purple discoloration (bruising or necrosis) or open sores.
- Evaluating the specific shape of the swelling helps the veterinary team prepare for your arrival.
- Triage photos help determine how quickly your dog needs to be moved to the front of the queue for stabilization and pain management.
Clinical Context (Merck Veterinary Manual)
Acute inflammation of the testis or epididymis (orchitis and epididymitis) in dogs can result in pain and swelling of the testes, epididymides, and/or scrotum. Causes include trauma, infection (fungal, bacterial, or viral via hematogenous or urologic routes), or testicular torsion. Examination should include careful palpation of the scrotal contents to identify involved structures, although patient discomfort and edema can make this difficult; ultrasonography with sedation or analgesia is helpful for further evaluation, confirmation of testicular torsion, and identification of focal lesions or other causes of scrotal enlargement, such as scrotal hernia or hematoma. Diagnostic tests should include evaluation for *Brucella canis* infection and potentially cytologic examination of semen with bacterial and mycoplasmal culture, although semen collection may be difficult in painful animals; testicular or epididymal specimens for cytology and culture may be obtained by fine-needle aspiration, and testicular biopsy may be performed if needed after less invasive diagnostics.
Chapter: Urology, Infectious Disease, Surgery
Source: The Merck Veterinary Manual, 11th Edition (Page 1400)