Dog Hot Spots

Hot spots can look alarming because they often appear suddenly and get worse fast. Learn what causes these painful, itchy skin sores, when your dog needs a vet, and what safe steps you can take at home.

Talk to a vet

When to Call a Vet

Emergency

Go to the ER now

● Go to an emergency vet now if your dog has facial swelling, trouble breathing, collapse, or other signs of a severe allergic reaction along with sudden skin irritation.
● Seek immediate care if the hot spot is near the eye or your dog cannot open the eye comfortably.
● Get urgent emergency help if your dog seems severely painful, becomes aggressive when the area is touched, or cannot settle because of discomfort.
● Go now if your dog also has signs of heatstroke or serious illness, such as weakness, vomiting, confusion, seizures, or collapse.

Urgent

See a vet within 24 hours

● Call your vet within 24 hours if the area is red, moist, oozing, smelly, or spreading quickly.
● Make a prompt appointment if your dog keeps licking, chewing, or scratching despite using a cone or other barrier.
● Call your vet if your dog has repeated hot spots, since allergies, fleas, ear disease, anal gland problems, pain, or skin infections may be the underlying cause.
● Have your dog seen soon if the skin looks infected, swollen, crusted, or pus-filled, or if your dog seems itchy elsewhere too.
● Book a vet visit if the hot spot started after swimming, grooming, an ear problem, flea exposure, or a recent flare of allergies.

Monitor

Watch at home, call if it worsens

● You may be able to monitor a very small, newly noticed hot spot if your dog is otherwise acting normal and the area is not worsening.
● Keep monitoring if the spot is dry rather than oozing, your dog is comfortable, and you can prevent licking or chewing.
● Watch closely after gently cleaning the area and trimming surrounding hair only if it can be done safely and without causing pain.
● If the sore is not clearly improving within a day or is older than about 24 hours, call your vet rather than continuing home care.

Common Causes of Dog Hot Spots

🪳

Fleas and other parasites

Flea allergy dermatitis is a common trigger for intense itching in dogs, and that scratching can quickly turn into a hot spot. Mites and other insect bites can cause the same itch-scratch cycle.

🌿

Allergies

Environmental and food allergies can make dogs itchy enough to lick, chew, or scratch their skin raw. Dogs with atopic dermatitis are especially prone to recurrent skin flare-ups.

👂

Ear infections

Ear problems often lead dogs to scratch around the head, neck, and cheeks. That self-trauma can create a painful, moist sore very quickly.

💧

Moisture trapped in the coat

Swimming, bathing, rain, and damp matted fur can hold moisture against the skin. Warm, wet skin is more likely to become inflamed and infected.

🦴

Pain or irritation nearby

Dogs may lick over sore joints, irritated anal glands, or another painful area until the skin breaks down. The hot spot may be a clue to a deeper problem.

✂️

Mats, grooming, or skin irritation

Matted hair, dirty coats, and local skin irritation can trap debris and moisture or make the skin more sensitive. Once a dog starts licking, the lesion can spread fast.

What to Do at Home

Hot spots are often painful and can worsen within hours, so home care should focus on protecting the skin and preventing more licking while you monitor closely. Small, very new spots may improve with gentle care, but many dogs need veterinary treatment to address infection, pain, and the underlying cause.

Prevent licking and chewing right away with an e-collar or another vet-approved barrier.
Gently clean the surface with a mild cleanser or a pet-safe chlorhexidine product if your dog will tolerate it.
If your dog is calm and it can be done safely, trim hair around the sore so air can reach the skin and moisture does not stay trapped.
Keep the area clean and dry, and avoid swimming, bathing, or covering the lesion with a tight bandage unless your vet tells you to.
Check for possible triggers like fleas, ear irritation, recent swimming, matting, or excessive scratching elsewhere on the body.
Call your vet if the area is spreading, oozing, smells bad, seems very painful, or is not clearly improving quickly.

🏠

Frequently Asked Questions

What does a hot spot look like on a dog?

A hot spot usually looks like a red, inflamed, moist patch of skin that appears suddenly and can enlarge quickly. It may ooze, smell unpleasant, feel warm, and be very itchy or painful. Some are hidden under matted fur, especially in thick-coated dogs.

Can a dog hot spot heal on its own?

A very small, newly forming hot spot may improve with prompt home care if you can stop your dog from licking and keep the area clean and dry. But many hot spots worsen fast, and dogs often need a vet to treat infection, pain, or the underlying cause such as fleas, allergies, ear disease, or anal gland problems.

Should I take my dog to the vet for a hot spot?

Often, yes. You should call your vet if the lesion is oozing, spreading, smelly, painful, older than about a day, keeps recurring, or your dog will not stop bothering it. You should also have your dog seen if the hot spot is near the eye or your dog seems unwell.

What causes hot spots on dogs?

Hot spots are usually caused by self-trauma from scratching, licking, or chewing itchy or irritated skin. Common triggers include fleas, allergies, ear infections, moisture trapped in the coat after swimming or bathing, matted fur, anal gland irritation, and pain in nearby areas such as arthritic joints.

Are some dogs more likely to get hot spots?

Yes. Dogs with long or thick coats, matted fur, drop ears, allergies, flea problems, or frequent swimming may be more prone to hot spots. Cornell notes they are especially common in dogs with long or thick coats, and Cornell also reports that atopic dermatitis affects about 10% to 15% of dogs, which can contribute to recurrent itching problems.

Sources

Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.

Still worried about your dog?

Get personalized advice from a licensed veterinarian.