2025 Vet Guide: Bruising in Dogs – What It Means & When to Worry 🐶🩹

By Dr. Duncan Houston BVSc

Seeing unexplained bruises on your dog can be concerning. Bruising—blood leaking under the skin—can range from harmless to life‑threatening. This guide explains how to recognize bruises, understand possible causes, know when they require urgent care, and support your pet effectively. 🧭

🔍 1. Recognizing Bruises in Dogs

• Petechiae: Tiny pinpoint red or purple hemorrhages—often on gums, belly, or inner thighs.
• Ecchymosis: Larger blotchy bruises—dark red or purple patches—indicating deeper bleeding.
• Unusual places like ear flaps or eye whites may show bleeding.

⚠️ 2. Bruising Isn’t Normal

Due to dogs’ thick skin and fur, bruising usually occurs only after significant trauma. If you notice bruises without a clear injury, more serious issues may be present.

🧩 3. Common Causes of Bruising

• Trauma: Collisions, falls, surgery—but bruises should heal in days.
• Immune-mediated thrombocytopenia (ITP): Immune attack on platelets, resulting in spontaneous bleeding and bruising.
• Clotting disorders: Congenital (e.g., von Willebrand, hemophilia) or acquired (liver disease, rodenticides).
• Bone marrow suppression: Due to cancer or drugs, reducing platelet production.
• Vasculitis: Inflammation of vessels from infections, allergies, or autoimmune disease.
• Internal bleeding (hemoabdomen): Ruptured organs or tumors can lead to subcutaneous bruising.

🩺 4. When Bruises Need Urgent Vet Care

Seek veterinary help immediately if bruises are:

• Spreading or not improving after 72 hours.
• Appearing with lethargy, pale gums, labored breathing, collapse, or neurologic issues.
• Accompanied by bleeding from nose, gums, eyes, urine, or stool.

🧪 5. Diagnostic Steps

• Physical exam including careful checking of gums, skin, and belly.
• Bloodwork: CBC for platelets, clotting profiles, biochemistry.
• Imaging (X-ray/ultrasound) if internal bleeding or masses suspected.
• Specialized tests for clotting disorders and platelet function.
• Bone marrow biopsy in rare cases to assess production.

🛠️ 6. Treatment Options

• Minor trauma: Cold compresses and monitoring.
• ITP/drug-induced low platelets: Steroids (e.g., prednisone), immunosuppressants, maybe transfusion.
• Clotting disorders: Treat underlying cause; may need plasma or factor therapy.
• Internal bleeding: Surgery, fluid support for conditions like hemoabdomen.
• Infections/vasculitis: Antibiotics or immunomodulatory drugs.

🏡 7. Home Care & Prevention

• Keep dog calm and restrict rough play until bruises improve.
• Check bruised areas daily, apply gentle cold packs (wrapped in cloth).
• Administer vet-prescribed meds and monitor for new bruises.
• Maintain routine wellness exams to catch early disease.
• Use tools:
  • Ask A Vet: Ask about bruise severity & urgency.
  • Woopf: Log bruise locations, growth, meds.
  • Purrz: Track clotting health, diet, tests.

📚 FAQs

Q: My dog has a bruise after a vaccination—should I worry?

Small bruising at injection sites can be normal. But if it spreads, swells, bleeds, or persists past 3 days, contact your vet.

Q: Could flea bites or insect stings cause bruising?

Yes, you may see small red spots that don’t blanch—still monitor for spreading and systemic signs.

Q: Can I apply heat instead of cold?

No—use cold for bruises to reduce bleeding and swelling. Warmth may increase swelling.

💬 Owner Insight

> “Our Lab developed spots on her belly with no trauma. Blood tests showed low platelets—after prednisone and sheltering from stress, she’s bruise‑free!”

🏁 Final Thoughts from Dr Houston

Bruising in dogs—especially when unexplained—signals a possible serious issue. Prompt recognition, diagnosis, and appropriate treatment can prevent life‑threatening conditions. Utilize tools like Ask A Vet, Woopf, and Purrz to monitor, record, and manage your dog’s health confidently into 2025. 💙🐾

Download the Ask A Vet app for bruise triage, symptom tracking, and expert veterinary guidance anytime. 📱

AskAVet.com – Protecting skin, safeguarding life.