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.

Can Dogs Get Sick From Fleas? Vet-Verified Health Concerns

Share

Flea in animal fur close up

As a dog owner, you’ve likely had a few run-ins with fleas. Those black jumping pests feed on the blood of their hosts and can leave small, red bumps on the skin. Apart from seeing them, you’ll often suspect your dog has fleas as soon as they start scratching and nibbling at their skin. As annoying and uncomfortable as fleas can be for your dog, they usually don’t cause too much harm. However, this isn’t always true, and some dogs do get sick from fleas.

Not only do fleas pose a risk of infesting your home if your dog brings them home from the park, but they can be carriers of certain diseases and can make some dogs sick. We’re going to discuss what health problems fleas can cause for your dog and how to prevent them from inflicting your dog in the first place.

divider single dog paw oct 2024

What Health Problems Can My Dog Get from Fleas?

Thankfully, most dogs with a few fleas won’t become terribly ill. However, these tiny pests can cause quite a few problems, especially if your dog is overly infested with them. As soon as you see a flea in your home or on your pet, it’s important to reach out to your veterinarian for treatment, as this will help prevent them from reproducing and getting out of control.

Below are a few health issues they can cause for your dog:

1. Tapeworm

Dogs can become infected with tapeworms simply by ingesting a flea that is carrying a tapeworm larva. This can happen quite easily as dogs groom themselves. They might even bite the area where a flea has just bitten them and swallow them as they do so. Once ingested, the tapeworm larvae can grow and attach itself to the intestinal lining.

In some cases, dogs may vomit a tapeworm out, or the segments can be seen in their poop. Dogs with tapeworms need to be given medication from a veterinarian, which will kill the tapeworm, and flea control products should be used as well.


2. Allergic Reaction

A dog can develop flea allergy dermatitis from just a few bites. When a flea bites a dog, its saliva contacts the dog’s skin. Some dogs, especially those that suffer from other forms of allergies, are much more sensitive to the antigens in the saliva and can develop an allergic reaction to it. The signs of flea allergy dermatitis is red, scabby skin that is extremely itchy.

Sometimes, a dog that is infested with fleas will scratch their skin excessively and develop scabs and wounds. Your dog may even begin to lose their hair in patches due to all the licking, biting, and scratching they do to resolve their itch.

All this can quickly turn into an infection, so it’s important to treat your dog when you see signs of dermatitis. Flea allergy dermatitis can be treated with oral flea medications and skin treatment.

Brown dog scratches itself
Image Credit: Photo-Vista.de, Shutterstock

3. Bartonella Infection

Although Bartonella infection is more commonly associated with cats, it can also occur in dogs. It is a bacterial infection that is carried by fleas (and several other types of parasites) and spread through their bites. If a dog contracts Bartonella, they may experience fever, joint pain, sore muscles, digestive upset, and nasal discharge.

Dogs can spread Bartonella to humans if they bite them, but this isn’t very common. This infection is diagnosed through blood tests and can be treated with antibiotics. There are no vaccines to protect against Bartonella, so it’s important to get your dog on a good flea and tick preventative.


4. Anemia

Puppies and smaller dogs that have a severe flea infestation may be at risk for flea bite anemia. A few flea bites won’t cause anemia but when many fleas feed on a young dog’s blood, it can deplete their red blood cells, leading to anemia. Anemic puppies may have pale gums, a decreased appetite, weakness, and lethargy.

In severe, life-threatening cases, the puppy may need a blood transfusion. However, most of the time, flea bite anemia can be treated by dealing with the flea infestation through topical or oral treatments and supportive care.

dog sad sick sleeping bored
Image Credit: Przemek Iciak, Shutterstock

How to Prevent Illnesses from Fleas

The best way to protect your dog from getting sick from fleas is to prevent them from getting bitten in the first place.

Here are a few things you can do to protect your dog from fleas:

  • Chat with your veterinarian about the best flea prevention products for your dog, as well as any other pet in your home. Some types can be effective for up to 3 months.
  • Limit their contact with unfamiliar animals.
  • If your dog likes to be outdoors, treat the yard with pet safe flea sprays. Focus on shaded areas and your dog’s favorite sleeping spots. Cut tall grass, rake up the leaves, and trim the bushes.
  • Regularly wash your dog’s bedding with hot, soapy water.
  • Vacuum your home regularly.
  • Comb through your dog’s coat daily, looking for fleas and flea dirt.

Contact your vet if your dog has recently contracted or been treated for fleas and develops a secondary illness like the ones outlined above.

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

divider dog paws 3 oct 2024

Conclusion

As common as fleas are in households with dogs, they can cause more serious problems than a couple of red bites along your dog’s skin. Dogs can get sick from fleas if they swallow a flea that is carrying tapeworm larva, are allergic to flea saliva, get bitten by a flea that is a carrier of Bartonella, or if they have an extreme infestation that can cause anemia.

Thankfully, most of these health problems are quite simple to treat, but veterinarians will still recommend flea and tick prevention treatments to keep your dog safe from flea bites in the first place.


Featured Image Credit: Vera-Larina, 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

We Bred English Bulldogs So Extreme They Can’t Mate Naturally

Picture this: A male English Bulldog waddles over to a female in heat, full of confidence and swagger. Then… nothing. His barrel chest,...

Damning Dry Dog Food Report Not What It Seems

Over the past few days, pet and vet communities have been reeling from the revelation that high levels of heavy metals have been...

Ask Dr. Paola- Help! My Dog’s Won’t Stop Barking! (February 23, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why You Should Never Ignore Yellow Dog Poop

Yellow dog poop is one of those things that sounds bizarre until it happens to your dog. Then suddenly you’re standing there with...

More related

Silkzer (Miniature Schnauzer & Silky Terrier Mix): Info, Pictures, Care & More

The Silkzer is a hybrid dog created by crossing a purebred Silky Terrier with a Miniature Schnauzer. It’s an energetic small dog that...

9 Types of Dog Beds to Choose for Your Pup in 2026

Everyone loves having a comfortable bed to sleep in, and your dog is no exception! Just like people, dogs have preferences about their...

Guide to Probiotics for Dogs: What They Do & How to Choose

Probiotics can offer a wide variety of potential benefits for dogs when given consistently as part of a daily routine. Depending on the...

10 Best Dog Toys in 2026 – Reviews & Top Picks

Dog toys can provide exercise, mental stimulation, and even companionship for your dog. They can also buy you some peace while your pup...

Keep reading

Can Dogs Eat Mango? Vet-Approved Safety & Feeding Tips

No matter what you’re eating, your dog likely stares on with envy. Most dogs love to eat what their humans eat, but dogs have no idea if the food is good or bad for them or possibly even downright toxic—this...

Can Dogs Eat Mango

Semi-Moist, Dry & Canned Dog Food: Vet-Reviewed Pros & Cons

The world of dog food, diets, and what to feed your dog specifically has become an ever-changing topic. With so many brands, flavors, and types these days, it has almost become a complicated and mysterious affair to unravel. Yet it...

different kinds of dry and wet pet food

Canidae Dog Food Review 2026: Recalls, Pros & Cons

Review Summary   Aimed at dogs of all shapes, sizes, and ages, Canidae dog food has been around since 1996 and is one of many high-quality brands available for pets throughout the U.S.A. With its focus on sustainable and regenerative...

Dogster_Canidae Dog Food Review

Do Foxes Attack and Eat Dogs? How to Avoid Danger in Your Backyard

Foxes are rather common creatures, found in both rural settings and more populated areas like towns and even major cities. They’re wily creatures and have a reputation for making messes that they often didn’t actually create, though these scavenging predators...

red fox walking on wet street

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

Finn Dog Supplements Review 2026: An Expert’s Breakdown

Have you ever found yourself searching high and low for the perfect supplements to meet your dog’s needs? It can be confusing with the number of products on the market, and many of them are designed in fancy and eye-catching...

DOG_SAPR_Finn Dog Supplements

Can Dogs Eat Saffron Rice? Vet-Verified Facts & Safety Guide

Saffron rice is a tasty and savory dish, and dogs may be tempted to eat it. Many dogs enjoy the taste of rice and may see no problem with eating saffron rice. However, the issue with saffron rice is that...

Can Dogs Eat Saffron Rice

Can Dogs Eat Pizza? Vet-Verified Nutrition Facts & FAQ

Pizza is undoubtedly a staple in the US, with more than 6,000 slices consumed in a person’s lifetime. That’s a lot of pizza! Since pizza is such an American favorite, dog owners know that pizza is a coveted food item...

Can Dogs Eat_Pizza

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter