Dog Hot Spots — Causes, Treatment & Prevention
Hot spots (acute moist dermatitis) are painful, inflamed skin lesions that appear suddenly and spread rapidly. They occur when dogs lick, scratch, or chew at an area, creating a warm, moist environment where bacteria thrive. Without treatment, hot spots can expand from a small area to a large wound within hours.
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Common Causes
Allergies
Schedule Vet VisitEnvironmental allergies (pollen, grass, dust mites) or food allergies cause itching that leads to scratching and licking, creating hot spots. This is the most common underlying cause.
Flea Bites
Schedule Vet VisitEven a single flea bite can trigger intense itching in sensitive dogs, leading to frantic scratching that damages skin. Flea allergy dermatitis is a common hot spot trigger.
Insect Bites or Stings
Monitor at HomeBees, mosquitoes, ants, and other insects can cause localized reactions that dogs scratch at, creating hot spots.
Matted or Wet Fur
Monitor at HomeDense coats that stay damp after swimming or bathing create an ideal environment for bacteria. Long-haired breeds are particularly prone to hot spots.
Ear Infections
Schedule Vet VisitDogs with ear infections often scratch at their ears and neck, creating hot spots below or around the ear.
Anal Gland Problems
Schedule Vet VisitImpacted or infected anal glands cause discomfort that leads dogs to lick and chew at their rear end and base of tail.
Boredom or Anxiety
Schedule Vet VisitStress, boredom, or separation anxiety can lead to compulsive licking (acral lick dermatitis) that creates chronic hot spots, typically on the legs.
Minor Wounds
Monitor at HomeA small scratch, scrape, or thorn can trigger licking that prevents healing and leads to hot spot formation.
How to Photograph for Best AI Analysis
Getting a clear photo helps our AI provide more accurate insights. Follow these tips:
- Part the fur to show the actual skin lesion clearly
- Photograph the entire affected area, not just the center
- Include surrounding fur to show if it's matted or wet
- Show the location on your dog's body
- If taking follow-up photos, use the same angle for comparison
- Note if there's any discharge or oozing visible
When to See a Veterinarian
Contact your veterinarian if you notice any of the following:
- •The hot spot is larger than a few inches or spreading rapidly
- •You see pus, a foul smell, or signs of deep infection
- •Your dog has a fever, is lethargic, or won't eat
- •The hot spot is near the eye, ear, or other sensitive area
- •Your dog gets recurring hot spots (underlying cause needs addressing)
- •At-home treatment isn't showing improvement within 24-48 hours
- •The area is extremely painful or your dog won't let you touch it
- •You're unsure if it's a hot spot or another condition
How PetSensAI Can Help
PetSensAI's skin scanner can help identify hot spots and assess their severity. Our AI analyzes the size, appearance, and characteristics of skin lesions to help you determine if at-home care is appropriate or if veterinary attention is needed. Regular scans help track healing progress.
Related Symptoms
Sources
- VCA Animal Hospitals — Hot Spots in Dogs
- Merck Veterinary Manual — Dermatitis in Dogs
About the Author
PetSensAI Editorial Team
Pet Health Content
Our editorial team creates pet health guides informed by reputable veterinary sources and reviewed for clarity and safety. Always consult a licensed veterinarian for medical advice.
Medical Disclaimer: This content is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a licensed veterinarian for any health concerns about your pet.
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Last updated: 2025-01-09