If your dog suddenly starts obsessively licking, scratching, or chewing one spot, you might be dealing with one of the most frustrating skin problems in veterinary medicine. Hot spots on dogs — also called acute moist dermatitis — can turn a perfectly healthy patch of skin into an angry, oozing sore in a matter of hours. I have seen hot spots go from barely noticeable to the size of a dinner plate overnight, and I know how alarming that is for any dog owner.
In this guide, our team walks through everything you need to know about hot spots on dogs: causes, treatment, and prevention. We cover what triggers them, how to recognize the early signs, step-by-step first aid you can do at home, when to call your vet, and how to stop them from coming back.
Hot spots are painful and they spread fast, but the good news is that with the right approach, most heal within a week. The key is acting quickly and understanding what started the cycle in the first place. Let us get into it.
Table of Contents
What Are Hot Spots on Dogs?
Hot spots on dogs are localized, painful, red, and inflamed areas of skin that appear suddenly and spread quickly. The technical term is acute moist dermatitis, and it describes exactly what happens: the skin becomes inflamed, moist, and infected — usually because of a self-perpetuating cycle of licking, scratching, and chewing.
Here is how the cycle works. Something irritates your dog’s skin — an insect bite, an allergy, a small scrape, even trapped moisture under matted fur. Your dog responds by licking or scratching the area. That licking creates more irritation and moisture, which becomes a breeding ground for bacteria. The bacterial infection makes the area itchier, so your dog licks more. The cycle feeds itself, and the hot spot grows.
The name “hot spot” comes from the warmth you can feel when you touch the area. That heat is generated by the inflammatory response and the bacterial infection underneath the skin surface. Hot spots are not contagious to other dogs or to people, but they are deeply uncomfortable for your dog and can worsen rapidly without intervention.
These lesions can appear anywhere on your dog’s body, but the most common locations are the neck, the area near the base of the tail, the haunches, the sides, and the legs. Dogs with dense, thick double coats are especially vulnerable because moisture and debris get trapped close to the skin where it is hard to dry or spot early signs of trouble.
What Causes Hot Spots on Dogs
Understanding what causes hot spots on dogs is the first step to treating and preventing them. Hot spots almost never appear without an underlying trigger. The sore itself is a secondary problem — something else starts the itch-scratch cycle, and the hot spot is the result.
Allergies
Allergies are the number one cause of hot spots on dogs. Flea allergy dermatitis is the most common culprit — even a single flea bite can trigger intense itching in a sensitive dog. Food allergies and environmental allergies (pollen, grass, mold, dust mites) also drive the kind of relentless scratching that leads to hot spots. If your dog gets hot spots repeatedly, allergies should be the first thing you and your vet investigate.
Ear Infections and Anal Gland Issues
Dogs with ear infections often develop hot spots on the side of their face or neck from scratching at their ears. Similarly, impacted or infected anal glands cause dogs to lick and chew at their rear end and the base of their tail, creating the perfect conditions for a hot spot. Any localized discomfort that leads to repeated licking can trigger one.
Moisture
Trapped moisture is a major contributor, especially during warmer months. Dogs that swim, get bathed, or get caught in the rain can develop hot spots if their thick undercoat stays damp. I have talked to many Golden Retriever and Labrador owners who report hot spots appearing a day or two after a swim. The moisture creates a warm, humid environment right against the skin where bacteria thrive.
Behavioral Causes: Stress, Anxiety, and Boredom
Not all hot spots start with a physical irritant. Some begin with behavioral licking. Dogs that are stressed, anxious, or bored may lick themselves obsessively as a coping mechanism. This is sometimes called psychogenic alopecia or stress licking, and it can create the same moist, inflamed sore that an allergy would. Dogs left alone for long periods, dogs dealing with changes in routine, or dogs that lack mental stimulation are all at higher risk.
Poor Grooming and Matted Fur
A dirty, matted coat traps moisture, debris, dead skin cells, and bacteria right against the skin. Dogs that are not groomed regularly — especially longhaired and double-coated breeds — are more prone to hot spots because the skin underneath never gets a chance to breathe and dry properly. Mats also pull on the skin, causing irritation that triggers licking.
Breed Predisposition
Some breeds get hot spots far more often than others. Golden Retrievers, Labrador Retrievers, German Shepherds, Bulldogs, Rottweilers, and Saint Bernards are among the most commonly affected. Dogs with thick, dense double coats are at a natural disadvantage because their coat holds heat and moisture against the skin. Dogs with a history of allergies in their line are also more susceptible.
What Does a Hot Spot Look Like on a Dog?
Recognizing a hot spot early makes treatment much easier and faster. A hot spot on a dog looks like a raw, red, inflamed patch of skin that is often oozing or crusty. The hair in the area is usually missing — either because the dog has licked it away or because the inflammation has caused it to fall out.
Here are the signs to look for:
- A localized area of redness and swelling
- Warm to the touch — the skin literally feels hot
- Moist, oozing, or crusted surface (sometimes with pus)
- Hair loss in a circular or irregular patch
- Your dog constantly licking, biting, or scratching one area
- A distinct odor coming from the sore
- Pain or flinching when the area is touched
Hot spots can range from the size of a quarter to the size of your palm, and they can double in size within 24 hours. They are most commonly found on the neck, under the ears, on the haunches, near the base of the tail, and along the legs. In severe cases, you may see multiple hot spots on different parts of the body, especially if the underlying cause is a systemic allergy.
If you part your dog’s fur and find a red, raw, wet-looking patch of skin, assume it is a hot spot and start treatment right away. The sooner you intervene, the faster it heals and the less your dog suffers.
How to Treat Hot Spots on Dogs
Treating hot spots on dogs involves two things: caring for the sore itself and addressing whatever triggered it. If you only treat the sore without fixing the underlying cause, the hot spot will keep coming back — something many frustrated dog owners discover the hard way.
Step-by-Step First Aid for Hot Spots on Dogs
Here is the process I recommend for treating a hot spot at home when you first discover it:
Step 1: Trim or shave the fur around the hot spot. Use clippers (not scissors) to remove hair at least one inch beyond the edge of the sore. This exposes the full area, lets air reach the skin, and prevents fur from sticking to the wound.
Step 2: Gently clean the area with a mild antiseptic solution. Use a chlorhexidine solution (diluted to 2%) or a pet-safe antiseptic cleanser. Do not use hydrogen peroxide or rubbing alcohol — these damage healthy tissue and slow healing. Pat dry with a clean gauze pad.
Step 3: Apply a soothing topical treatment. A thin layer of hydrocortisone cream (0.5% to 1%) can reduce inflammation and itching. Alternatively, use a pet-formulated hot spot spray. Some owners have success with raw honey applied as a natural antibacterial dressing.
Step 4: Prevent your dog from licking the area. This is the most critical step. Use an Elizabethan collar (cone) or a soft recovery collar. If your dog can still reach the hot spot with the collar on, you need a larger size. The hot spot will not heal if your dog keeps licking it.
Step 5: Clean and reapply treatment twice daily. Gently wipe away any discharge with antiseptic, pat dry, and reapply your topical treatment. Continue this routine until the skin is no longer red and oozing.
Most uncomplicated hot spots start looking better within 48 to 72 hours and fully heal within 7 to 10 days with consistent home care.
Home Treatment Options and Product Safety
Many dog owners ask about specific products. Here is what is safe and what to avoid.
Hydrocortisone cream (0.5% – 1%) is generally safe for dogs when applied to a localized hot spot for a few days. It reduces inflammation and itching, which helps break the lick cycle. Avoid products with added fragrances or ingredients like zinc oxide.
Neosporin is not ideal for dogs. While it is not highly toxic, it contains bacitracin, neomycin, and polymyxin B — and some dogs are allergic to bacitracin, which can make the problem worse. It also tends to attract dirt and fur when applied to a raw sore. A chlorhexidine-based spray or a veterinary-recommended hot spot spray is a better choice.
Tea tree oil is mentioned frequently in dog owner forums, and some pet-formulated sprays contain diluted tea tree oil. However, tea tree oil in its concentrated form is toxic to dogs. Only use products specifically formulated and diluted for pets — never apply pure tea tree oil directly to your dog’s skin.
Raw honey is a popular natural remedy among experienced dog owners. It has natural antibacterial properties and can create a protective barrier over the sore. Apply a thin layer and cover with a non-stick pad if possible, then use a cone to prevent your dog from licking it off.
When to See a Vet for Hot Spots
Not every hot spot requires a veterinary visit, but some absolutely do. Use this 24-hour rule: if the hot spot does not show noticeable improvement within 24 hours of starting home treatment, call your vet. You should also seek veterinary care if you notice any of the following:
- The hot spot is extremely large or spreading rapidly despite treatment
- The sore is producing thick, yellow, or green pus with a foul odor
- Your dog has a fever or seems lethargic
- The skin is blackened, necrotic, or deeply ulcerated
- Your dog is in visible pain and cannot rest
- Hot spots keep recurring and you have not identified the underlying cause
Vets have access to prescription-strength treatments that work much faster than over-the-counter options. They can also identify the underlying cause, whether that is a food allergy, a flea infestation, an ear infection, or something else entirely.
What the Vet Will Do
Your veterinarian will typically clip and clean the hot spot, just as you would at home but more thoroughly. They may prescribe a short course of oral antibiotics to address the bacterial infection, a topical steroid cream or oral corticosteroids to reduce inflammation, and an antihistamine to control itching. In severe cases, they may recommend a medicated shampoo for follow-up care at home.
The vet visit is also your best opportunity to investigate why the hot spot happened. If allergies are suspected, they may recommend allergy testing or a food elimination trial. If an ear infection or anal gland impaction is found, treating that directly will prevent future hot spots in the same area.
Recovery Timeline and Recurring Hot Spots
Most hot spots heal within 3 to 7 days with proper treatment. Deeper or more severe infections may take up to 2 weeks. The key factor in recovery time is whether you can keep your dog from licking the area — a dog that keeps re-injuring the spot will have a much longer healing process.
If your dog gets hot spots repeatedly, you are dealing with an unresolved underlying issue. The most common reasons for recurring hot spots are undiagnosed food allergies, ongoing flea exposure, chronic ear infections, and environmental allergies that flare seasonally. Working with your vet to identify and manage the root cause is the only way to break the cycle long-term.
How to Prevent Hot Spots on Dogs
Prevention is always easier than treatment. Once you know what causes hot spots on dogs, the prevention strategies become straightforward. Here is what our team recommends based on both veterinary guidance and real owner experience.
Keep Your Dog Well-Groomed
Regular grooming is your first line of defense. For thick-coated breeds, this means brushing several times a week to prevent matting and remove dead undercoat. During shedding season, daily brushing may be necessary. Professional grooming every 4 to 6 weeks helps keep the coat manageable and allows a professional to spot early skin issues you might miss.
Dry Your Dog Thoroughly After Water Exposure
This is especially important for dogs that swim or get bathed frequently. Towel dry thoroughly, and consider using a blow dryer on a cool or low-heat setting to dry the undercoat. Pay close attention to areas where moisture gets trapped: the neck, under the ears, the armpits, and the haunches. Trapped moisture is one of the fastest paths to a hot spot.
Manage Allergies Proactively
If your dog has known allergies, work with your vet on a management plan before hot spot season hits. This might include flea prevention medication year-round, a hypoallergenic diet, seasonal antihistamines, or prescription allergy medications like Apoquel or Cytopoint. Dogs on consistent allergy management plans get far fewer hot spots.
Reduce Stress and Boredom
For dogs that lick out of anxiety or boredom, environmental enrichment is a genuine prevention strategy. Puzzle feeders, daily walks, training sessions, and interactive toys give your dog something to do besides obsessively groom. If separation anxiety is the trigger, work with a trainer or behaviorist on a gradual desensitization plan.
Use Preventive Topical Products
Some owners use leave-in conditioning sprays with soothing ingredients like oatmeal, aloe vera, or chamomile after grooming. Medicated shampoos with chlorhexidine can help dogs prone to skin infections. These are not cures, but they help maintain a healthy skin barrier that resists the conditions that create hot spots.
Seasonal Awareness
Hot spots are most common in warm, humid weather — summer is peak season. During these months, be extra vigilant about drying your dog after water exposure, staying current on flea prevention, and checking your dog’s skin daily if they are a predisposed breed. Early catches mean easier treatment.
FAQ
How to prevent dogs from getting hotspots?
Dry your dog thoroughly after swimming or bathing, maintain a regular grooming schedule to prevent matting, use year-round flea prevention, manage known allergies with your vet, and reduce boredom with daily exercise and enrichment. Check your dog’s skin regularly, especially during warm and humid months when hot spots are most common.
How to make a dog stop having a hot spot?
Clip the fur around the hot spot, clean with a diluted chlorhexidine solution, apply hydrocortisone cream or a pet-formulated hot spot spray, and immediately put an Elizabethan collar on your dog to prevent further licking. Clean and reapply treatment twice daily. If the hot spot does not improve within 24 hours, see your veterinarian.
How long can a hotspot last on a dog?
Most hot spots on dogs heal within 3 to 7 days with proper treatment. Severe or deep infections can take up to 2 weeks. The healing time depends on how quickly you start treatment and whether you can prevent your dog from licking the area. A recovery cone is essential for faster healing.
Will neosporin help a hotspot on a dog?
Neosporin is not recommended for hot spots on dogs. Some dogs are allergic to bacitracin in Neosporin, which can worsen the irritation. A chlorhexidine-based antiseptic spray or a pet-formulated hot spot treatment is a safer and more effective option.
Are hot spots on dogs contagious?
No, hot spots are not contagious to other dogs or to people. They are a localized skin reaction caused by self-trauma (licking, scratching, chewing) combined with a secondary bacterial infection. However, if multiple dogs in your household have similar skin issues, they may share an environmental trigger like fleas or allergens.
Do hot spots go away on their own?
Hot spots rarely go away without intervention. The itch-lick cycle keeps the sore moist and infected, causing it to spread. Without treatment, a small hot spot can become a large, painful infection. Start first aid immediately and see your vet if there is no improvement within 24 hours.
Final Thoughts
Hot spots on dogs are painful, fast-spreading, and frustrating — but they are also highly treatable when you catch them early and follow through with consistent care. The most important thing to remember about hot spots on dogs: causes, treatment, and prevention all connect. You treat the sore to give your dog relief, but you investigate the cause to stop it from returning. Whether the trigger is allergies, moisture, stress, or an underlying infection, working with your veterinarian to identify and manage the root problem is the best thing you can do for your dog’s comfort and long-term skin health.