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

6 Best Essential Oils for Dogs in 2026 – Reviews & Top Picks

Essential oils are known for helping people and their pets relax when situations become stressful. You may think any oil on the store...

What Vitamin Deficiency Causes Hair Loss in Dogs? Vet-Verified Facts

A dog’s skin is supported by the food they eat. If they don’t eat the right diet, it can cause hair loss and...

How to Meditate With Pets — 9 Simple Tips

The benefits of meditating are well-documented in the scientific literature. Research has shown it can relieve pain.1 It may also reduce your risk...

Florida Fake Service Dog Laws: Legalities & Ethics (Vet-Verified)

Service dogs are a necessity for hundreds of thousands of people with disabilities. With service dogs, people who might have certain limitations that...

More related

7 Dogs in TV Commercials Who’ve Pushed Cereal

If your only knowledge of the world came via breakfast cereal marketing, then you’d probably wonder why more crime isn’t grain-related. In television...

Italian Greagle Dog Breed: Info, Pictures, Care & More

The Italian Greagle is a combination of the Italian Greyhound and the Beagle. Beagles are renowned for their happy and friendly personalities. They...

What Foods Reduce Anxiety in Dogs? 10 Vet-Verified Nutrients & Methods to Help

It can be quite heartbreaking watching your dog deal with anxiety and stress. Your first call should be to your veterinarian, particularly if...

Phantom Poodle: Info, Pictures, Origin & History

When you think of Poodles, do you imagine Paris and the Eiffel Tower? If you do, you’re not too far off. Poodles are...

Keep reading

How to Calculate Pet Food Dry Matter Basis (With Calculator)

What is dry matter basis and why is it important for pet food? We’ve got the answers—and a calculator—to help you determine the ratio of nutrients to moisture content. When looking at the nutritional values of pet food, the guaranteed...

dry dog food in plastic bag and dog head

Can Dogs Eat Vegetables? Vet-Verified Nutrition Facts, Safe Options & Benefits

Domestication has profoundly affected our canine companions. They have gone from carnivorous predators to pampered pets. Roughly 95% consider them members of their families. That’s huge for an animal we once considered a competitor. The gray wolf is the closest...

vegetable basket

8 Best Human-Grade Dog Foods in 2026: Reviews & Top Picks

“Human-grade” dog food is a loose term that can be a bit confusing. According to the Association of American Feed Control Officials (AAFCO), this means that all the ingredients are edible for humans.1 Essentially, this label on a dog food...

cream dog eating from the bowl

Freeze-Dried vs. Dehydrated Dog Food 2026 Comparison: Pros & Cons

Many dog owners who are trying to feed their canines healthier foods choose either freeze-dried foods or dehydrated foods. On the shelf, both of these foods can look reasonably similar. However, they are quite different. Luckily, the differences aren’t all...

Dogster_Freeze-Dried vs. Dehydrated Dog Food

Top 10 Most Popular Dog Treat Brands in 2026 – Reviews & Top Picks

Dog owners know how much their pets love treats. What could be better than a delicious treat to reward your dog for a job well done? There are many different flavors, textures, and sizes of dog treats, as well as...

jack russell terrier having treats

11 Best Large Breed Dog Foods in 2026 – Reviews & Top Picks

Large breed dogs need different nutrition than other breeds out there. They require more joint-supporting supplements, for instance, because their joints carry much more weight. Most large-breed dog foods are designed specifically to counteract these issues. However, this isn’t always...

labrador eating outside

7 Best Dog Foods for Hip Dysplasia in 2026 – Reviews & Top Picks

Dogs love to run and play, but if your dog has mobility issues like hip dysplasia, the joint pain can prevent these fun activities. Hip dysplasia is an abnormal formation of the hip socket that can cause dysfunction and pain,...

close up of a dog eating from the bowl

Gentle Giants Dog Food Review 2026: Pros, Cons & Verdict

Review Summary What do Robin, the Boy Wonder, and Gentle Giants dog food have in common? Burt Ward, the actor who portrayed Robin in the Batman TV show in the 1960s, is the founder of the highly rated dog food...

Dogster_Gentle Giants Dog Food Review