TL;DR: Crusty buildup on a dog's penis is usually normal smegma, but you should consult a vet if you notice signs of pain, blood, or excessive licking.
What is the crusty buildup on my dog's penis?
Finding a yellowish-white or slightly green crusty buildup on your dog's penis or sheath is actually quite common. This substance is usually smegma, a natural mixture of dead skin cells, oils, and moisture that serves as a lubricant and protective barrier. When it dries at the tip of the prepuce, it forms a crust. While often normal, an increase in this discharge can sometimes indicate balanoposthitis, which is a mild inflammation of the area.
Is crusty buildup on my dog's penis a medical emergency?
- Urgency level: Low. In the vast majority of cases, crusty buildup on a dog's penis is not a medical emergency.
- Monitoring: If your dog is acting normally, eating well, and urinating without discomfort, you can likely monitor the situation at home.
- When to call a vet: Schedule a routine check-up if you notice signs of pain, blood, significant swelling, or if your dog is constantly licking the area.
Why should I provide a photo of my dog's discharge to a veterinarian?
- Photos allow a vet to see the color, texture, and exact location of the buildup.
- Visuals help determine if the discharge is within the normal range for your specific dog.
- A clear image can help identify signs of an infection or a growth that requires more immediate intervention.
Clinical Context (Merck Veterinary Manual)
Mild balanoposthitis, resulting in a slight mucopurulent preputial discharge, is present in many sexually mature dogs and of little clinical significance, only requiring reasonable hygiene. More severe balanoposthitis may result from trauma, lacerations, neoplasia, foreign bodies, urinary tract infection, urolithiasis, or phimosis. A mucopurulent preputial discharge is the most common clinical sign. Excessive licking of the prepuce may also be noted. Examine the penis and prepuce thoroughly to the level of the fornix for underlying predisposing factors using saline infusion through a rigid endoscope or an otoscope, with sedation or general anesthesia if needed. Preputial cytology may be helpful, and bacterial cultures may identify unusual organisms and determine antibiotic sensitivities for refractory cases. Treatment includes correcting any predisposing factors, clipping long hair away from the preputial orifice, and thoroughly flushing the preputial cavity with a mild antiseptic (e.g., dilute povidone-iodine or chlorhexidine) or sterile saline solution.
Chapter: Urology, Infectious Disease
Source: The Merck Veterinary Manual, 11th Edition (Page 1401)