What Is a Hot Spot on a Dog?
One day your dog's coat is fine. The next morning there's a wet, red, raw patch the size of a coin, or your palm, usually somewhere they've been licking obsessively. Welcome to the hot spot, one of the most common (and most dramatic-looking) skin problems in dogs.
The short answer
A hot spot, vets call it acute moist dermatitis, is a rapidly growing patch of raw, inflamed skin that a dog creates by licking, chewing, and scratching at one itchy place. Something starts the itch (a flea bite, allergies, trapped moisture), the dog's mouth and claws keep it going, and within hours the skin breaks down into a moist, painful sore that spreads fast. Hot spots need a vet's treatment to close, plus, crucially, stopping the licking; the good news is most look dramatically better within a week of proper care.
Why they happen so fast
The hot spot cycle is a feedback loop with the dog on both ends:
- A trigger itches. Flea bite, environmental or food allergy, a swim that left the undercoat damp for days, a mat pressing on skin, a scrape from grooming or roughhousing.
- The dog attacks the itch. Licking, chewing, scratching, which damages the skin surface.
- Damaged, wet skin gets worse. Saliva keeps the site moist, broken skin weeps, and the normal bacteria on skin multiply in the warm, wet mess.
- Worse skin itches more. Return to step 2, faster. This loop is why a dime at breakfast is a saucer by dinner.
The usual suspects for location: cheek and neck (under floppy ears), hips and rump (classic for flea-triggered spots), and the base of the tail. The usual suspects for dogs: thick double coats (Goldens are the poster breed, plus Shepherds, Newfies, Rottweilers, Doodles), swimmers, allergy dogs, and anyone in humid summer weather.
What treatment looks like
Take the dog in, hot spots are painful, they spread, and they occasionally hide something underneath (an abscess, a deeper infection). The vet playbook is quick and effective:
- Clip the fur over and around the spot so air reaches it and moisture stops being trapped
- Clean the site properly (often under mild sedation if it's very painful)
- Medicate, typically anti-itch medication to break the loop, and antibiotics if the skin is infected
- Block the mouth, a cone or recovery collar, because no treatment survives continued licking
- Find the trigger, flea check, allergy conversation, grooming habits, so this isn't a monthly event
Most spots dry out, scab, and shrink noticeably within 3–7 days of this routine. (We wrote a full guide to what that progression looks like: Dog Hot Spot Healing Stages.)
The daily routine that helps prevent the next one
Hot spot prevention is mostly moisture and itch management, and it's the same routine that keeps a coat fresh generally:
1. Dry your dog properly. After swims, baths, and rainy walks, towel down to the undercoat, especially neck, chest, and behind the ears. Trapped dampness is the #1 preventable trigger.
2. Stay ruthless about fleas. Year-round prevention. One bite starts the loop in allergic dogs.
3. Brush on schedule. Mats hold moisture against skin like a wet bandage. Thick-coated dogs need the undercoat actually reached, not just the surface skimmed.
4. Keep the coat and problem zones clean. A quick wipe-down of the itch-prone areas, neck folds, under the ears, hips, lifts away grime, dander, and odor buildup. A few sprays of Burrow Made Everyday Mist on a cloth (or directly on the coat, it's lick-safe and sting-free) after park days and swims makes this a 60-second habit. Cleansing, not medicating, the point is keeping healthy skin clean and dry so the loop never starts.
5. Watch the early warning. A dog who keeps returning to lick one spot is telling you something. Part the fur and look today, catching pink irritation before it becomes an open sore is the whole game.
FAQ
Are hot spots contagious? No, not to other dogs, cats, or people. The bacteria involved are the normal residents of dog skin, overgrowing in damaged territory.
Can I treat a hot spot at home without a vet? Small, just-started irritation? You can clip carefully, keep it clean and dry, and block licking, and it may settle. But true hot spots are painful, fast-moving, and often need prescription anti-itch medication to break the cycle. If it's raw, spreading, or clearly hurting, go in. Waiting usually means a bigger, more expensive spot.
Why does my dog get hot spots every summer? Heat, humidity, swimming, and peak flea season all stack in summer. If it's a pattern, talk to your vet about allergies, recurring hot spots are usually an allergy story wearing a skin-problem costume.
Do hot spots leave scars? Usually not. Fur typically regrows fully within a few weeks, though it can come in slightly darker at first.
Hot spot or something else? Wet, raw, sudden, painful, and licked constantly = hot spot. Dry, scaly, slow, and circular = possibly ringworm. We wrote a side-by-side guide: Hot Spot vs. Ringworm.
Burrow Made Everyday Mist is a gentle, lick-safe cleansing mist for everyday grime and odor, it is not a medication and does not treat hot spots or skin conditions. For any raw, painful, or spreading skin issue, see your veterinarian.