TL;DR: Dried blood on a cat's penis often indicates urinary tract inflammation and requires a vet visit within 24 hours; however, it is a life-threatening emergency if your cat is unable to urinate.
What does it mean if I find dried blood on my cat's penis?
Finding dried blood on the tip of your cat's penis is often a sign of irritation or inflammation within the lower urinary tract. This condition, often referred to as Feline Lower Urinary Tract Disease (FLUTD), can be caused by various factors including:
- Urinary tract infections (UTIs)
- Sterile cystitis
- The presence of crystals or stones in the bladder
- Over-grooming due to discomfort or minor trauma to the area
Is dried blood on my cat's penis a veterinary emergency?
The urgency level for dried blood on the penis is generally considered Medium. While the presence of blood alone requires a veterinary appointment within 24 hours, the situation becomes a critical, life-threatening emergency if your male cat is:
- Straining to urinate or vocalizing while in the litter box.
- Unable to pass any urine at all (potential urinary blockage).
- Lethargic or refusing to eat in addition to urinary symptoms.
- If your cat is still eating, drinking, and urinating normally, you should still schedule a prompt visit to rule out underlying infections or stones.
How does a photo of my cat's symptoms help with veterinary triage?
Providing your veterinarian with a clear photo of the area can be incredibly helpful for remote triage. A photo allows the medical team to assess:
- The exact color and amount of the discharge.
- The condition of the surrounding tissue, including swelling or active bleeding.
- The urgency of the visit based on visual clinical signs.
- The specific diagnostic tests, such as a urinalysis or imaging, that your cat may require upon arrival.
Clinical Context (Merck Veterinary Manual)
Balanoposthitis, while rare in cats, can present with a mucopurulent preputial discharge. Trauma, lacerations, neoplasia, foreign bodies, urinary tract infections, urolithiasis, or phimosis may result in more severe presentations. The penis and prepuce should be thoroughly examined for underlying predisposing factors. Preputial cytology may be helpful, and bacterial cultures of the preputial cavity can help identify unusual organisms and determine antibiotic sensitivities for refractory cases.
Chapter: Urology, Infectious Disease
Source: The Merck Veterinary Manual, 11th Edition (Page 1401)