Dog Hot Spots (Acute Moist Dermatitis)
Monitor closely
Quick answer
Hot spots are inflamed, infected skin areas that appear suddenly and spread quickly due to licking, scratching, or chewing. They often start from a minor irritant but worsen rapidly because moisture and bacteria thrive on the damaged skin. Prompt attention helps prevent deeper infection and significant discomfort.
Common causes
Allergies (food, environmental, or flea)
Itchy skin from pollen, dust mites, certain foods, or flea saliva triggers intense scratching that breaks the skin and starts a hot spot.
Moisture trapped in the coat
Swimming, bathing, or humid weather can leave damp fur against the skin, creating ideal conditions for bacterial overgrowth.
Parasites (fleas, mites, or ticks)
Bites and the resulting itch cause dogs to chew at one spot repeatedly until it becomes raw and infected.
Underlying skin conditions
Seborrhea, mange, or poor grooming habits can weaken the skin barrier and invite bacterial infection.
Stress or boredom
Some dogs lick or chew repetitively as a coping mechanism, focusing on one area until it becomes a hot spot.
When to see a vet
- Hot spot larger than a coin or spreading rapidly
- Foul odor, pus, or deep open sores
- Fever, lethargy, or loss of appetite
- Hot spot near the eyes, ears, or genitals
- Dog seems painful or won't let you touch the area
Home care tips
- Gently trim fur around the spot to let air reach the skin
- Clean with lukewarm water or a vet-approved antiseptic wipe
- Apply a cool, damp compress for 5–10 minutes to reduce itching
- Use an Elizabethan collar to prevent further licking and chewing
- Keep the area dry and check daily for improvement
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FAQ
Can hot spots heal on their own?
Small, early hot spots sometimes improve with clipping, cleaning, and preventing licking, but many need veterinary treatment to clear the infection and address the underlying cause.
How long do hot spots take to heal?
With proper care, improvement is usually visible within 3–5 days, though full healing may take 1–2 weeks depending on size and severity.
Are hot spots contagious to other pets or people?
The bacterial infection itself is not typically contagious, but if fleas or mites caused the hot spot, those parasites can spread to other animals.
Should I put anything on a dog's hot spot at home?
Stick to gentle cleaning and drying; avoid human creams, alcohol, hydrogen peroxide, or steroid products unless your vet specifically recommends them.
Why does my dog keep getting hot spots?
Recurrent hot spots usually point to an unresolved allergy, chronic moisture exposure, parasites, or behavioral licking that needs a veterinary workup to manage long-term.