Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Fleas & Hot Spots on Dogs: Vet-Verified Causes, Signs & Treatment

Hot spot on dog's neck during summer heat.

Hot spots are painful and irritating lesions that can form on your dog’s skin. Hot spots can be caused by a variety of issues, and fleas are sometimes the culprit. Fleas and other insect bites can cause skin irritation, self-trauma, and the development of hot spots.

Although they’re small, fleas are significant nuisances that can quickly wreak havoc on your entire home. If you notice any hot spots on your dog, it’s best to schedule an appointment with your veterinarian for treatment right away, as they can progress quickly.  Here’s how you can help your dog if you suspect fleas have caused hot spots on your dog.

divider single dog paw oct 2024

How Do Fleas Cause Hot Spots on Dogs?

Hot spots, or acute moist dermatitis, are skin lesions that can appear on any part of your dog’s body. They are red, inflamed and oozy. They’re itchy and painful and may have an unpleasant odor and contain pus.

Fleas are parasites that survive by feeding on their host’s blood. Flea bites often feel itchy to dogs, and dogs usually scratch, bite, or lick flea bite sites to alleviate the irritation. Many dogs are also allergic to flea bites, and they will have a more severe reaction even to only a few flea bites. The self trauma from the scratching, licking and chewing of the skin can lead to hot spots developing.

If your dog has started scratching or licking themselves more than usual, we suggest booking a consult with a vet for advice on next steps.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

How to Treat Fleas and Hot Spots on Dogs

owner applying flea and tick medicine to a dog
Image Credit: Nick Alias, Shutterstock

The best way to keep fleas at bay is to be on top of preventative treatment. Many different kinds of preventative flea products exist, and it’s best to consult your veterinarian to determine the best kind for your dog. Your veterinarian can help you find the right brand and determine if your dog should use topical treatments, oral medication, or medicated collars.

If your dog does end up with a flea infestation, it’s important to act quickly. Fleas can transfer to other pets and people and infest a home in just a matter of days. Consult your veterinarian for the best form of treatment for your dog. Your veterinarian may recommend flea pills or spot-on products to help kill the fleas on your dog. You’ll also have to clean and vacuum the house and apply a household flea spray. The bedding needs to be washed on a hot wash. Getting rid of fleas is a rigorous process, and it can take around 3 months to eradicate a house of fleas completely.

Your veterinarian can also help you treat your dog’s hot spots. Hot spots are usually cleaned with antiseptic, and your dog may also have to wear a cone until the hot spot heals to prevent further self-trauma. Depending on the severity of the hot spot, your veterinarian may prescribe antibiotics and anti-itch medication. You’ll have to continue to monitor the hot spot and contact your veterinarian if it’s not healing or if it’s getting worse.

divider dog faces oct 2024

Other Signs of Fleas on Dogs

You may be able to notice other signs of a flea infestation before a hot spot appears on your dog’s skin. A common sign of fleas is increased scratching, licking, and biting the skin. You may notice small brown particles on your dog’s coat that look like fine coffee grounds. These particles are also known as flea dirt or flea droppings.

Fleas can also cause skin inflammation and hair loss. In some cases, fleas may cause tapeworm infestations. Fleas can carry tapeworm eggs, and your dog can swallow these eggs while licking or biting their skin.

Other Causes for Hot Spots

Fleas and insect bites aren’t the only cause of hot spots. Anything that causes irritation to the skin and self trauma can cause hot spots to form. Common causes include skin allergies, ear disease, and skin injuries and grazes. Occasionally behavioral issues can cause excessive licking which can lead to hot spots developing.

Poor grooming can also contribute to hot spots forming. Matted fur collects moisture and doesn’t allow the skin to breathe, and hot spots can erupt from the skin underneath these areas. Excessive moisture in a dog’s coat after swimming, bathing, or sometimes even drooling can lead to hot spots in the same way.

Dogs with impacted anal glands often resort to scooting and licking to alleviate the irritation. This can often cause hot spots around the tail.

Puppy Jack russell with scratching himself and bite fleas
Image Credit: Yuliya Evstratenko, Shutterstock

divider dog paws 3 oct 2024

Conclusion

Dogs can get hot spots from fleas due to the irritation and resulting self-trauma to the skin that they cause. However, hot spots can be caused by many other kinds of health issues. So, if you notice hot spots on your dog, it’s best to get them checked out by your veterinarian since the sore patch can progress surprisingly quickly. Your veterinarian can diagnose if the hot spot is caused by fleas or another health issue. Getting the proper diagnosis will help you provide appropriate treatment for your dog’s hot spots and ensure their skin heals as quickly as possible.


Featured Image Credit: Tienuskin, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

The Anxious Pet Relax & Roll Calming Soft Dog Chews Review 2026: Our Expert’s Opinion

Please note: Sadly, Anxious Pet has closed its doors, and is no longer taking orders. We have not changed our review below, though...

10 Best Dog Foods for Bloodhounds in 2026 – Reviews & Top Picks 

Bloodhounds are having a bit of a moment. Trumpet, a 4-year-old bloodhound from Illinois, won Best in Show at this year’s Westminster Kennel...

Intervertebral Disc Disease in Dogs: Signs, Causes & Diagnosis (Vet Answer)

Your dog’s back is painful, or they suddenly have trouble getting around. You know that Dachshunds are predisposed to back problems. Is that...

24 Dog-Friendly Stores in the US (2026 Update)

It can be challenging to shop with your dog in tow, with most stores not allowing our four-legged friends inside due to health...

More related

How Long Do Dog Seizures Last? Vet-Reviewed Facts & FAQ

One minute everything seems fine, and the next your dog falls to their side and begins convulsing. Seizures happen when there is a...

How Long Can a Dog Go Without Water? Vet-Verified Facts & Safety Guide

Maybe you have found a stray or witnessed a dog sidle up to someone’s backyard without access to fresh water. Or maybe your...

Behavioral Changes During Proestrus and Estrus in Dogs: Vet-Approved Facts

Female dogs typically go through a heat cycle twice a year, during which time, they can mate and conceive babies. The first part...

How to Get Dog Pee Smell & Stains Out of a Mattress: 8 Effective Steps

Owning a dog has many benefits and challenges, including urine stains when accidents happen. Urine leaves unpleasant colors and lingering odors that can...

Keep reading

Can Dogs Eat Miso Soup? Vet-Verified Nutrition Facts & Risks

Dogs are more than just pets. Roughly 95% of owners consider their canine companions as members of their families, so it only makes sense that you’d want to share some of your food with your pup. Of course, some foods...

Can Dogs Eat Miso Soup

6 Great Sources of Carbohydrates for Dogs: Vet-Verified Nutrition Facts

When it comes to dog nutrition, carbohydrates are a tricky subject. While canines can get energy from protein and fat, many dog food brands contain one or multiple sources of carbs. On the opposite end, there are dog food recipes...

dog eating rice

Can Dogs Eat BBQ Chips? Vet-Approved Facts & FAQ

When you’re enjoying a bag of BBQ potato chips and your dog hits you with those pleading eyes, you might wonder if it would be okay to give your dog a few chips. Are they safe for dogs? Generally speaking,...

Can Dogs Eat_bbq chips

Why Does My Puppy Eat So Fast? 5 Vet-Reviewed Reasons & Advice

Bringing a new puppy into your home is always exciting, but along with the good can sometimes come some bad. Your puppy may exhibit some behaviors that you need to train them out of, like chewing on absolutely everything or...

Great Dane Puppy Eating

Can Dogs Eat Nutritional Yeast? Vet-Verified Nutrition Facts & Info

Nutritional yeast is all the rage among health-conscious eaters looking for delicious and nutritious ways to zest up their meals. With its generous mix of protein and essential nutrients, you’re right to wonder if you can offer this vegan-friendly ingredient...

Can-Dogs-Eat-Nutritional-Yeast

Can I Claim Dog Food on My Taxes in 2026? Pet-Related Deductions Guide

Tax season is never fun. We always hope there are things we can claim when filing. Surprisingly enough, there are several cases where the cost of your dog’s food may be tax-deductible. Usually, pet-related expenses are considered personal expenses, so...

woman computing taxes with her dog

Darwin’s Natural Selections Dog Food Review 2026: An Expert’s Breakdown

If you’re a proud owner of a dog, you’ve likely heard about raw dog food diets and subscription services. While there are lots out there to check out, the big question is, are they all the same? That’s what we’re...

Darwin’s Natural Selections Dog Food

Can Dogs Eat Sunflower Butter? Vet-Reviewed Facts & FAQ

This rich, delicious seed butter is often used by humans as an alternative to peanut butter or a topping that shines on its own. But can dogs eat sunflower butter too? Yes! Sunflower butter is a healthy treat for dogs...

Can Dogs Eat_Sunflower Butter