Dr. Tiffany Delacruz, DVM • Chief Executive Officer, RexVet • 2026-07-03 • 9 min read
Dog Hot Spots: Causes, Home Care & Vet Treatment — FL, NY & VA Summer Guide
Dog hot spots (acute moist dermatitis) explode in FL/NY/VA humid summers. Fast home care, prescription options, and $64.99 video vet visits with FL/NY/VA-licensed vets.
Medically reviewed by Dr. Tiffany Delacruz, DVM
Nothing goes from 0 to emergency faster than a hot spot. One minute your dog is fine. Six hours later, there's a fist-sized red weeping wound under her ear that she won't stop licking. This guide is for FL, NY, and VA dog parents who need to know exactly what to do in the first hour — and why treating the underlying itch matters more than the wound itself.
What's actually happening
A hot spot (formally: acute moist pyotraumatic dermatitis) is a rapidly-spreading skin infection triggered by self-trauma. Something itches. The dog scratches, licks, or chews. Moisture + heat + broken skin + normal skin bacteria = an angry red wound that spreads outward in hours. Left alone, hot spots reach the size of a coaster in one day. The bacteria involved are Staph pseudintermedius (dog Staph) and sometimes secondary Pseudomonas.
The 5 common triggers
- Flea infestation or flea allergy dermatitis (FAD) — #1 trigger year-round in FL, seasonal NY/VA
- Environmental allergies (atopic dermatitis) — pollen, mold, dust mites. Peak spring and fall.
- Food allergies — chicken, beef, dairy, wheat. Present with year-round itch pattern.
- Ear infection (otitis externa) — dog scratches around ear, creates a hot spot on the cheek or neck
- Wet coat + heat — swimming, bathing, walking in rain then not drying. Long-coat breeds trap moisture at the skin.
Signs it's a hot spot vs a minor itch
- Red, moist, weeping lesion that expands within hours
- Circular or oval shape with sharp borders
- Dog obsessively licking, chewing, or scratching one specific spot
- Hair matted with pus or serum around the lesion
- Foul smell
- Painful to gentle touch
- Common spots: cheek near ear, side of neck, hip, base of tail
First-hour home care
- Prevent further licking — cone (e-collar) IMMEDIATELY, no exceptions
- Gently trim or shave hair around the lesion with a 2-inch margin using electric clippers (not scissors — the wound is painful)
- Clean with dilute chlorhexidine (dilute the surgical scrub 1:10 with water) or plain saline solution
- Pat dry gently — no rubbing
- Do NOT use hydrogen peroxide or rubbing alcohol on the wound — they damage healing tissue and delay recovery
- Do NOT use Neosporin near the mouth or where the dog can lick — has minimal effect and causes vomiting if ingested in quantity
- Get a vet appointment for prescription topicals and often oral steroid within 24 hours
Prescription treatment
- Topical antibiotic — mupirocin ointment or silver sulfadiazine cream 2-3x/day for 7-10 days
- Topical corticosteroid — hydrocortisone spray or a triple-med spray (steroid + antibiotic + antifungal)
- Oral prednisone — short course (5-7 days tapering) to break the itch cycle. Turns a 2-week resolution into 5 days.
- Oral antibiotic — cephalexin, Simplicef, or clavamox for 10-14 days if the lesion is deep or infected
- Flea prevention if fleas are the trigger — NexGard, Bravecto, Simparica
- Cytopoint or Apoquel if atopy is the trigger — long-term itch control
Prevent the next one
- Year-round flea prevention — even in NY/VA winters
- Dry thoroughly after swimming or rain — especially ears, under legs, between toes, tail base
- Regular grooming for long-coat breeds — mats trap moisture
- Ear cleaning weekly for floppy-eared breeds
- Anal gland expression when needed (or work with a groomer)
- Allergy workup if hot spots recur more than 2-3 times a year
Florida: year-round hot spot season
Florida's warm humid climate makes hot spots a year-round threat, peaking May through October. Beach dogs, pool dogs, and dogs kept in humid backyards are highest risk. FL flea burden is heaviest in the US — every FL dog needs year-round flea prevention (NexGard, Bravecto, Simparica) as the single most effective hot spot prevention. Swimming season means dry thoroughly after every swim.
New York: summer humidity + fall allergies
NY hot spots peak June through September. NYC dogs on hot humid summer walks + apartment air conditioning cycles + summer allergens (grass, tree pollen, mold) create a triple trigger. Fall ragweed allergies are a second peak in September/October. NY dogs also benefit from year-round flea prevention despite winter cold — heated indoor spaces keep fleas active.
Virginia: tick disease overlap + humid summers
VA humid summers plus rural exposure means hot spots plus tick disease overlap. Always tick-check any VA dog with a new skin lesion — Lyme disease and Ehrlichia can cause skin lesions that mimic hot spots. VA dogs benefit from year-round flea/tick prevention.
How telehealth fits
$64.99 RexVet video visits with FL/NY/VA-licensed vets diagnose hot spots by video, prescribe topical mupirocin or silver sulfadiazine + oral prednisone, and identify the underlying trigger (fleas, allergies, ear infection). Deep infected wounds, wounds larger than a fist, or wounds that don't respond in 48 hours need in-person culture + more aggressive care.
Emergency signals
When to contact a veterinarian
- Any red weeping lesion that expanded within hours
- Dog obsessively licking or chewing one spot
- Foul-smelling skin lesion with matted hair
- Hot spot larger than a golf ball
- Fever or lethargy alongside a skin wound
- Hot spot that doesn't improve within 48 hours of home care
- Recurrent hot spots — needs allergy workup
Frequently asked questions
What's the fastest way to treat a hot spot at home?
Cone the dog immediately to stop licking. Trim or shave hair around the lesion with a 2-inch margin. Clean with dilute chlorhexidine or saline. Pat dry. Get a vet appointment for prescription topicals + oral prednisone within 24 hours — this is what turns a 2-week wound into a 5-day recovery.
Can a RexVet online vet treat a dog hot spot?
Yes. $64.99 video visits with FL/NY/VA-licensed vets diagnose hot spots by video, prescribe topical mupirocin or silver sulfadiazine, oral prednisone for itch control, and often oral antibiotics. We also identify the underlying trigger (fleas, allergies, ear infection). Deep infected wounds need in-person culture.
Why do hot spots keep coming back on my dog?
Every hot spot has a trigger. Recurrent hot spots almost always mean unresolved fleas, environmental allergies (atopic dermatitis), food allergies, or ear infections. Treating the wound without treating the cause guarantees recurrence. Ask for an allergy workup or a Cytopoint/Apoquel trial for long-term itch control.
Can I use human antibiotic ointment on a dog hot spot?
Neosporin has minimal effect on hot spots and causes vomiting if the dog licks it. Human hydrocortisone cream can help mildly if applied to a covered area, but prescription mupirocin ointment plus a short oral prednisone course is far more effective and safer.
How long does a dog hot spot take to heal?
With prescription treatment (topical antibiotic + oral prednisone) and a cone, most hot spots resolve in 5 to 7 days. Without treatment or with the dog continuing to lick, they can persist 2 to 3 weeks and spread. Speed of initial intervention is the biggest factor.
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About the author
Dr. Tiffany Delacruz, DVM
Chief Executive Officer, RexVet
Licensed veterinarian and CEO of RexVet (Rex Vets Inc.). Practicing across Florida, New York, and Virginia via licensed telehealth. Reviews every clinical article on RexVet before publication.