Short answer: Hot spots (acute moist dermatitis) start when a dog repeatedly licks or chews one spot, breaking the skin and letting normal Staph bacteria explode. The trigger is almost always something itchy underneath: fleas, allergies (food or environmental), anal gland disease, ear infection, or a hidden mat.
What you should actually do
- Most common in summer and in thick-coated breeds (Golden, Lab, GSD, St. Bernard) – heat + moisture trapped under the coat.
- Top triggers: flea allergy dermatitis (FAD), atopic dermatitis (environmental allergies), food allergy, otitis, anal gland disease.
- First-line treatment: shave around the lesion, gently clean with chlorhexidine 2% diluted to 0.05%, apply topical steroid/antibiotic spray, e-collar for 7-10 days.
- Oral steroids and antibiotics shorten healing in moderate-severe cases (1-2 weeks of cephalexin + 5-7 days of prednisone is a typical script).
- Underlying allergy management is what stops recurrence – flea control 12 months/year, allergy testing, hydrolyzed diet, or Apoquel/Cytopoint.
A classic hot spot starts as a small itchy area the dog licks during the night, and by morning is a 2-inch weeping raw lesion that hurts to touch. The wet bacterial soup (usually Staph pseudintermedius) spreads outward unless the dog is stopped from licking – which is why the e-collar isn’t optional.
Recurrence is the rule, not the exception, because the underlying allergy isn’t being treated. A dog with more than 2 hot spots per year deserves a serious workup: year-round flea prevention, atopy testing or hydrolyzed protein elimination diet trial, and consideration of Apoquel (oclacitinib) or Cytopoint (lokivetmab) for atopic disease.
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⚕️ Medical Disclaimer
The information on this page is intended for educational purposes only and does not replace a hands-on veterinary examination. Drug doses depend on your dog’s complete clinical picture, concurrent medications, and the exact product formulation. Always confirm dosing with your veterinarian before administering any medication, and contact a 24-hour veterinary emergency service or animal poison control immediately if you suspect a medication overdose or adverse reaction. Editorial standards: every drug dose published on PuppaDogs is cross-checked against multiple authoritative veterinary references and reviewed by PuppaDogs Veterinary Editorial Team before publication.
