Dog Hives in 2025: Vet-Backed Guide 🐾🩺

By Dr. Duncan Houston BVSc

📌 What Are Hives (Urticaria)?

Hives—or urticaria—are sudden red, raised, itchy welts that appear on your dog’s skin. They result from a rapid release of histamine from mast cells and can vary in size from tiny bumps to large swollen patches.

🔍 Common Causes of Dog Hives

• Insect bites or stings (bees, wasps, ants)
• Food reactions or new treats
• Medications and vaccines
• Shampoos, chemicals, or contact with plants
• Heat, stress, exercise, or sunlight exposure

👀 Signs to Watch For

• Raised, red, itchy welts anywhere—even face, ears, belly, paws
• Swelling around the face or mouth—dangerous if it affects breathing
• Excessive scratching, licking, or discomfort
• Drooling or panting if the tongue or throat is swollen

🩺 Diagnosis: What Your Vet Will Do

Your veterinarian will review your history and conduct a skin exam. If needed, they may suggest:

• Allergy testing or elimination trials
• Bloodwork to rule out underlying issues
• Skin swabs or scraping if infection is suspected

💊 Treatment Options

• Antihistamines: Benadryl, cetirizine, loratadine under vet guidance
• Steroids: Prednisone or injectables for moderate cases
• New meds: Zenrelia (2024 OTC), Apoquel, Cytopoint for chronic allergy control
• Topicals: Medicated shampoos, sprays, or oatmeal baths to soothe skin
• Cold compresses: Quick relief from itch and swelling
• Fluids & injectable meds: Severe or systemic reactions may require IV fluids or epinephrine

⚠️ When to Visit the Vet Immediately

• Facial or throat swelling, difficulty breathing
• Hives lasting more than 24 h or reoccurring frequently
• Signs of infection—fever, pustules, hair loss

🛡️ Prevention Tips

• Avoid known triggers: topical products, risky foods, plants
• Supervise outdoor time to reduce insect bites
• Regular grooming and baths with soothing shampoos
• Maintain flea/tick prevention—flea allergy is common
• Consider immunotherapy for chronic allergies

📈 Outlook & Prognosis

Most mild hive outbreaks resolve within 12–48 hours with minimal intervention. Severe or chronic cases may require ongoing medication and monitoring, but with proper management, dogs lead happy, itch-free lives. 🐶❤️

📞 Final Thoughts

If your pup develops sudden itchy bumps, facial swelling, or shows signs of discomfort, contact your vet promptly. For convenient support, consult with a professional anytime through the Ask A Vet app 📱.