Have you ever noticed your dog repeatedly licking, scratching, or biting one particular patch of skin? If the area suddenly becomes red, wet, and sore, a hot spot could be the reason.
Veterinarians often call this condition acute moist dermatitis. Hot spots are irritated skin lesions that can develop quickly, especially when a dog keeps scratching or licking an already itchy area. They can become painful and may develop a secondary bacterial infection.
The important thing to understand is that a hot spot is often a sign of an underlying problem. Fleas, allergies, ear infections, minor injuries, and moisture trapped in the coat can all contribute. Treating the sore matters, but identifying what made your dog itch in the first place can help prevent another one.
What Causes Hot Spots on Dogs?
Most hot spots begin with an itch, irritation, or source of discomfort. When a dog repeatedly scratches, licks, or chews the area, the skin becomes damaged. That irritation can lead to more itching, creating a cycle that allows the sore to grow.
1. Allergies
Environmental allergens, such as pollen and dust mites, can make some dogs intensely itchy. Food allergies may also cause skin symptoms in certain dogs. Repeated scratching can damage the skin and contribute to a hot spot.
If your dog frequently scratches, licks their paws, or develops recurring skin irritation, speak with your veterinarian about possible allergies. The symptoms alone cannot tell you which allergen, if any, is responsible.
For more information, read our guide to seasonal allergies in dogs.
2. Fleas and Other Parasites
Flea bites can trigger severe itching, particularly in dogs with flea allergy dermatitis. Mites and other parasites may also cause skin irritation. A dog can scratch or chew the affected area until the skin becomes raw, even if you do not immediately notice fleas.
Use parasite prevention recommended for your dog's age, health, lifestyle, and location. If you suspect an infestation, your veterinarian can help you choose an appropriate product and explain how to protect other pets in the household.
Learn more in our guide to common parasites in dogs.
3. Wet Fur and Poor Coat Maintenance
Swimming, bathing, rain, and trapped moisture can contribute to skin problems, particularly when a dog has a long or dense coat. Matted fur can also hold moisture close to the skin and make it harder to spot irritation early.
Golden Retrievers, Newfoundlands, and other thick-coated dogs may need extra attention after getting wet. Dry your dog thoroughly and check beneath the coat, especially around the ears, neck, hips, and tail.
4. Ear Problems, Minor Injuries, or Other Sources of Pain
An ear infection can cause a dog to scratch around the ear or rub the side of the head. Inflammation around the anal glands, joint discomfort, insect bites, and small wounds can also prompt repeated licking or chewing.
If your dog keeps targeting the same area, do not assume the problem is simply boredom. A veterinary examination can help identify the cause and determine whether treatment is needed.
5. Repetitive Licking or Stress
Some dogs repeatedly lick or chew their skin when they are uncomfortable, anxious, or under-stimulated. This behavior can damage the skin, but medical causes of itching and pain should be considered before attributing it to stress alone.
What Does a Hot Spot Look Like?
Hot spots often appear suddenly and may worsen quickly when a dog continues to lick or scratch. Common signs include:
- A red, inflamed patch of skin.
- A moist or wet-looking sore, sometimes with discharge.
- Hair loss or fur matted around the affected area.
- An unpleasant smell from the lesion.
- Frequent licking, chewing, scratching, or rubbing.
- Pain or sensitivity when the area is approached or touched.
- Crusting or scabbing as the lesion changes.
Hot spots commonly occur around the head, neck, hips, and limbs, but they can develop elsewhere. Thick fur may conceal a sore until the dog begins reacting to it.
Important: Not every red or wet skin lesion is a hot spot. Other skin conditions can look similar, so avoid diagnosing the problem from appearance alone.
What to Do If Your Dog Has a Hot Spot
If you suspect a hot spot, contact your veterinarian promptly for advice. These sores can be painful, and treatment depends on the size of the lesion, the degree of inflammation or infection, and the underlying cause.
1. Prevent Further Licking and Scratching
Repeated licking and chewing can make the sore larger and delay healing. A properly fitted Elizabethan collar, commonly called an e-collar or recovery cone, can help keep your dog from reaching the area.
A recovery suit or soft collar may be suitable in some cases, but it must actually prevent access to the affected skin. Check the fit regularly and make sure the device does not rub the sore or interfere with eating, drinking, or breathing.
2. Keep the Area Undisturbed
Do not squeeze the lesion, pull away scabs, or scrub the skin. Avoid shaving the area yourself, especially with scissors: a painful, inflamed patch can be difficult to handle safely, and scissors can cut the skin.
Ask your veterinarian whether the area should be cleaned before the appointment and which product, if any, is appropriate. Do not apply human creams, essential oils, alcohol, hydrogen peroxide, or antiseptic solutions unless your veterinarian specifically recommends them.
3. Arrange Veterinary Treatment
Your veterinarian may clip the fur around the lesion, clean the skin, and prescribe medication to relieve itching or inflammation. Antibiotics may be appropriate when a bacterial infection is present, but they are not necessary for every hot spot.
The vet may also investigate fleas, allergies, ear disease, or another source of discomfort. Addressing that underlying problem is important, especially if your dog has had hot spots before.
When Should You See a Vet?
Contact your veterinarian as soon as you notice a suspected hot spot, particularly if the skin is open, wet, painful, or worsening. Seek urgent veterinary advice if:
- The affected area is spreading quickly.
- You see pus, substantial discharge, swelling, or a strong unpleasant smell.
- Your dog seems very painful, distressed, or unusually quiet.
- The sore is near an eye or affects a sensitive area.
- Your dog has several lesions or cannot stop chewing the skin.
- The skin problem keeps returning or does not improve with the treatment prescribed.
Do not wait for a fixed 24- or 48-hour period if the lesion is worsening or your dog is clearly uncomfortable. Your veterinarian can advise how quickly your dog needs to be examined.
How to Prevent Hot Spots in Dogs
Preventing every hot spot is not always possible, but a few regular habits can reduce common triggers and help you notice skin problems sooner.
1. Keep the Coat Clean, Brushed, and Dry
Brush your dog according to their coat type to reduce tangles and matting. After swimming or bathing, dry the coat thoroughly, paying attention to dense fur and areas that tend to stay damp.
Check the skin while grooming. If you discover a sore, avoid brushing directly over it and contact your veterinarian for advice.
2. Stay Consistent With Flea Prevention
Flea control is an important part of preventing itch-related skin problems. Follow a veterinarian-recommended prevention plan and use products only as directed for your dog's species, weight, and age.
For more information, see our guide to flea and tick treatments for dogs.
3. Investigate Recurring Itching
If your dog frequently scratches, chews their paws, shakes their head, or develops repeated skin sores, arrange a veterinary assessment rather than treating each episode as an isolated problem.
Depending on the findings, your veterinarian may recommend parasite control, ear treatment, allergy management, or further testing. Do not switch foods repeatedly in the hope of fixing itchy skin; suspected food allergies need a properly planned veterinary diet trial.
4. Address Persistent Licking and Chewing
Daily walks, interactive toys, reward-based training, and suitable opportunities to sniff and explore can support your dog's well-being. If repetitive licking continues, however, have medical causes ruled out before assuming the behavior is related to boredom or anxiety.
5. Check the Skin Regularly
During grooming or after outdoor activities, look for unusual redness, damp patches, scabs, hair loss, or areas your dog keeps scratching. Early attention can help you get advice before a small irritation becomes a larger sore.
Frequently Asked Questions
Can dog hot spots heal on their own?
Some small areas of irritation may settle, but a suspected hot spot can worsen quickly and may be infected. Contact your veterinarian for guidance rather than relying on it to heal without treatment.
Are hot spots painful for dogs?
Yes. Hot spots can be very itchy and painful. A dog may flinch, pull away, or resist being touched near the sore. Handle the area gently and do not force an examination at home.
Can I use human cream on my dog's hot spot?
Do not apply human creams or medications unless your veterinarian approves the specific product. Dogs may lick the area and swallow the ingredients, and some products can irritate damaged skin or be unsafe for pets.
Will my dog's hot spot come back?
It can. Recurrence is more likely if the original trigger, such as flea allergy, another skin condition, or an ear problem, remains untreated. Your veterinarian can help identify a prevention plan suited to your dog.
How long does a hot spot take to heal?
Healing time varies with the lesion's size, severity, underlying cause, and response to treatment. Follow your veterinarian's instructions and arrange a recheck if the sore worsens or fails to improve as expected.
Final Thoughts
Hot spots can appear quickly and leave dogs feeling miserable, but prompt attention and appropriate treatment can help the skin recover. Prevent licking, seek veterinary advice, and avoid applying unapproved products to the sore.
Most importantly, look beyond the visible patch. Managing the itch, parasite problem, allergy, or other trigger behind the hot spot can help reduce the chance of another painful episode.
Health note: This article provides general information and is not a substitute for an examination or treatment plan from a veterinarian.