"Why does my dog keep licking the same spot until it's raw?" That's the question most West Lebanon pet owners type into a search bar right before they call us. The short answer: that raw, weepy patch is almost certainly a hot spot, a surface-level skin infection that develops when a dog's constant licking, scratching, or chewing breaks down the skin barrier in one concentrated area. The good news is that caught early, most hot spots clear up within days with simple care.
Hanover Veterinary Clinic is a veterinary clinic in West Lebanon that treats hot spots, allergy flare-ups, and skin infections for dogs throughout the region. Below we'll walk through what's actually happening under that irritated patch of fur, why New Hampshire summers make things worse, and when a trip to the exam room beats waiting it out at home.
What Exactly Is Happening Under That Raw Patch?
A hot spot, formally called acute moist dermatitis, shows up as a red, moist, inflamed sore that can double in size within a single day. You'll typically spot one around the neck, hips, rump, or tucked behind an ear. The speed at which these lesions spread surprises a lot of owners who assumed they were dealing with ordinary dry skin.
Underneath the surface, something triggered the dog to lick or scratch obsessively in the first place, and that repeated trauma is what turns a minor itch into an open wound. Common triggers include flea bites, stings from bees or other insects, allergies, or moisture that gets trapped beneath a thick coat after swimming or a rainy walk. Dogs with dense double coats, like golden retrievers, German shepherds, and Labrador retrievers, run a higher risk simply because their fur holds onto dampness longer. Add in New Hampshire's humid July and August stretches, and you've got ideal conditions for a hot spot to form practically overnight.
Should I Treat the Hot Spot Myself First?
Yes, for small, isolated hot spots caught within the first day, home care is a reasonable first move. Trim the fur around the sore so air can reach it, clean the area gently with a mild antiseptic made for dogs, keep it dry, and put an e-collar on your dog to stop the licking cycle that's feeding the problem. Skip the medicine cabinet shortcuts: human products like hydrogen peroxide or Neosporin can irritate the skin further and aren't recommended without a veterinarian's guidance.
If the spot is bigger than a quarter, keeps spreading, or looks no better after 24 to 48 hours, it's time to stop self-treating and bring your dog to Hanover Veterinary Clinic for an exam. A veterinarian can check for deeper infection and prescribe antibiotics, a topical steroid, or a medicated spray depending on what the skin is telling us.
Is It Allergies, Fleas, or Something in the Food?
Most chronic itching in dogs traces back to one of three sources: environmental allergens like pollen, grass, and mold, a food sensitivity to something like dairy, wheat, or a specific protein, or flea allergy dermatitis, which remains the single most common allergic trigger in dogs. In New England, pollen counts climb sharply each spring and again in early fall, so if your dog's scratching seems to follow the calendar, an environmental allergy is a likely culprit.
Flea allergy dermatitis deserves special attention here because even one bite can set off a dramatic reaction in a sensitive dog. New Hampshire's wooded trails, brushy yards, and warmer, wetter seasons give fleas and ticks plenty of opportunity, which is exactly why year-round parasite prevention matters even when winter feels far off. Food allergies are less common than the other two, but when they're suspected, beef, chicken, dairy, and wheat top the list of usual suspects.
Watch for these signs regardless of the cause: paw licking, ear scratching, a foul odor coming from the skin or ears, watery or red eyes, visible rashes, and patchy hair loss. A seasonal pattern or a reaction that shows up right after flea season starts is often the clue that points us toward the right diagnosis.
Could This Be a Bacterial or Yeast Infection Instead?
It might be, and distinguishing between the two matters because the treatments differ. A bacterial infection, called pyoderma, usually caused by Staphylococcus bacteria, shows up as red bumps with crusting, hair loss, and a noticeable smell, and it typically responds to oral or topical antibiotics. A yeast infection, caused by Malassezia, tends to look greasy or flaky with a musty odor and darker skin, often settling into skin folds, ears, or paws, and it calls for antifungal treatment instead.
Because allergies weaken the skin's natural defenses through constant scratching, dogs with underlying allergies are prone to developing these secondary infections. A simple skin cytology, where a vet examines a sample under a microscope, usually settles the question of which infection is present so treatment can start on the right track rather than guessing.
When Does This Stop Being a Wait-and-See Situation?
Call your veterinarian once symptoms pass the 48-hour mark without improvement, if your dog seems to be in pain, if the skin is oozing or smells off, if hair loss is spreading, or if the itching is keeping your dog up at night. Those signs tell us the skin needs more than home care can offer.
Mild, early-stage hot spots and occasional seasonal itching are usually fine to manage at home for a day or two. Anything beyond that window, especially a sore that's growing or a dog that won't leave it alone, warrants a professional look. Our team at Hanover Veterinary Clinic can run a full skin evaluation and build a treatment plan around what's actually driving your dog's discomfort, rather than just masking the symptom.
Keeping Your Dog Comfortable Through a New Hampshire Summer
Itchy skin ranks among the top reasons dogs end up at the vet once warm weather hits, but it's also one of the easier problems to manage once you know what's causing it. Acting fast on a small hot spot, instead of hoping it resolves on its own, is usually what keeps it from turning into a larger infection that takes weeks to heal.
If you've noticed your West Lebanon dog licking, scratching, or chewing at one spot more than usual this season, don't wait for it to get worse. Reach out to the Hanover Veterinary Clinic team to schedule a skin exam. We offer wellness exams, diagnostics and imaging, and parasite prevention services that can catch these issues early and keep your dog comfortable all season long.
Frequently Asked Questions
Why does my dog's hot spot smell bad?
The odor usually comes from bacteria or yeast multiplying in the broken skin, which is common once a hot spot has been present for a day or two. A foul smell is a good sign it's time for a veterinary look rather than continued home care.
Can humidity in New Hampshire make hot spots worse?
Yes, moisture trapped under a thick coat during humid summer stretches is one of the most common hot spot triggers, especially for double-coated breeds. Drying your dog thoroughly after swimming or rain can reduce the risk.
How fast can a hot spot spread on a dog?
A hot spot can noticeably grow within just a few hours to a day because the licking and scratching that caused it tends to continue and worsen the irritation. That's why early intervention matters so much.
Do indoor dogs get hot spots too?
Yes, indoor dogs can develop hot spots from allergies, insect bites, or anxiety-driven licking even without heavy outdoor exposure. The trigger matters less than catching the lesion early and stopping the self-trauma cycle.
Is a hot spot contagious to other pets in my household?
No, hot spots themselves aren't contagious, but if fleas are the underlying cause, those fleas can certainly spread to other pets in the home. Treating the whole household for parasites is often part of a complete solution.
Book an Appointment or call us at (603) 643-3313.