Hot Spot vs. Ringworm: How to Tell the Difference
You're petting your dog and your fingers find it: a patch of missing fur with red, angry-looking skin underneath. Your brain immediately offers two guesses, hot spot? or the scarier one, ringworm?, and Google somehow makes it worse, because the photos look similar.
They're actually pretty easy to tell apart once you know what to look for. Here's the short version, then the details.
The 10-second answer
- Hot spot: appears fast (hours to a day), looks wet, raw, and oozy, is painful and intensely itchy, and your dog can't leave it alone. Usually one spot.
- Ringworm: appears slowly (days to weeks), looks dry, scaly, and circular with a crusty edge, is often only mildly itchy, and your dog may ignore it entirely. Often more than one spot, and it's contagious, including to people.
If it showed up overnight and it's wet: think hot spot. If it crept in over a week and it's dry and ring-shaped: think ringworm. Either way, the next step is the same, a vet visit, but knowing which one you're likely dealing with changes how careful you need to be in the meantime.
What a hot spot actually is
A hot spot (vets call it acute moist dermatitis) is self-inflicted. Something triggers an itch, a flea bite, allergies, a wet undercoat that never dried, a nick from grooming, and your dog licks, chews, and scratches the same patch of skin until it's raw. Broken skin plus constant moisture from licking creates a wound that spreads shockingly fast. A dime-sized irritation at breakfast can be a palm-sized raw patch by dinner.
Telltale signs:
- Sudden appearance, often literally overnight
- Moist, red, raw surface; may ooze or crust at the edges
- Hair loss with matted, damp fur around the border
- Obvious pain, your dog may flinch or growl if you touch it
- Obsessive licking or scratching at one spot
- Common locations: cheeks and neck (under floppy ears), hips, base of the tail
Who gets them: thick-coated and double-coated breeds (Goldens, Shepherds, Newfies, Doodles), swimmers, and any dog with allergies or fleas. Warm, humid weather is peak season.
What ringworm actually is
First, the name is a lie twice over, it's not a worm, and it's not always a ring. Ringworm is a fungal infection of the skin and hair (the same family of fungus behind athlete's foot in humans). It spreads by spores, which dogs pick up from infected animals, contaminated bedding, brushes, or soil.
Telltale signs:
- Circular or irregular patches of hair loss that expand slowly
- Dry, scaly, flaky skin, sometimes with a red, crusty border
- Mild or no itchiness (a key difference from hot spots)
- Brittle hair that breaks off at the edges of the patch
- Often multiple patches, commonly on the face, ears, paws, and tail
- Contagious to other pets and to humans, especially kids and anyone immunocompromised
Who gets it: puppies, seniors, dogs with weakened immune systems, and dogs from shelters, litters, or boarding environments where spores spread easily.
Side-by-side
| Hot spot | Ringworm | |
|---|---|---|
| Speed | Hours | Days to weeks |
| Texture | Wet, raw, oozy | Dry, scaly, flaky |
| Shape | Irregular, spreading | Often circular with defined edge |
| Itch/pain | Intense, dog won't leave it alone | Mild, dog often ignores it |
| Number | Usually one | Often several |
| Contagious? | No | Yes, to pets and people |
What to do next (for either one)
See your vet. Both conditions are very treatable, but they're treated completely differently. Hot spots typically get clipped, cleaned, and treated with anti-itch and antibiotic medication so the skin can finally close. Ringworm is confirmed with a fungal test and treated with antifungal medication, plus decontaminating bedding and brushes so it doesn't circulate through your household.
Until the appointment:
- Stop the licking if it's a hot spot, a cone or a soft recovery collar is genuinely the single most helpful thing you can do. The wound cannot improve while it's being licked.
- Don't apply human creams, hydrocortisone, or "natural" oils without your vet's okay. Anything you put on a hot spot will be licked off and swallowed.
- If you suspect ringworm, act like it's confirmed: wash your hands after touching your dog, keep them off your bed, wash their bedding hot, and keep kids' snuggles to a minimum until the vet weighs in.
- Keep the surrounding area clean. For everyday skin and coat upkeep, wiping away grime, dried gunk, and odor around (not on) an irritated area, a gentle, sting-free cleansing spray like Burrow Made's Everyday Mist cleanses and soothes without alcohol or fragrance, so you're not adding irritation to skin that's already having a bad week. It's a cleansing product, not a treatment, so let your vet handle the spot itself.
Prevention beats both
- Dry your dog thoroughly after swims and baths, down to the undercoat. Trapped moisture is the #1 hot spot trigger.
- Stay on flea prevention. One bite can start the itch-lick cycle.
- Brush regularly so mats don't trap moisture against skin.
- Wash bedding and grooming tools on a schedule, this is your main ringworm defense.
- Do a weekly hands-on check. Run your hands over your dog's coat once a week. You'll catch a dime-sized problem before it becomes a dinner-plate one.
FAQ
Can a hot spot turn into ringworm? No, they're unrelated conditions. But a hot spot can become infected with bacteria if untreated, which is why speed matters.
Can I catch ringworm from my dog? Yes. It usually shows up on humans as a small, red, ring-shaped itchy patch. It's treatable with over-the-counter antifungals for people, but see your doctor, and get your dog treated at the same time or you'll pass it back and forth.
Will either go away on its own? Hot spots almost never do, the lick cycle keeps them open. Ringworm can self-resolve in months, but in that time it spreads spores everywhere. Treat both.
How fast do hot spots heal with treatment? Once the licking stops and treatment starts, most look dramatically better within 3–7 days.
Burrow Made products are gentle cleansing and freshening sprays for everyday grime and odor, they are not medications and do not treat skin conditions. See your veterinarian for diagnosis and treatment.