Why Does your Dog Have Bruises And How to Take Care of Them?
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Have you ever been petting your dog only to have them suddenly wince, twitch, or pull away when you scratch a certain spot? That's a sign that your dog is in physical pain.
Bruising is one possible cause. While dogs can get bruises like people do, their thick skin and dense fur usually protect them from most everyday bumps and scrapes.
For this reason, unexplained bruising is rare in dogs and should not be ignored.
If your dog feels pain when touched, especially if you see purple, blue, or red marks, it could mean there is an injury or a health problem that needs a vet’s attention.
This guide will cover what causes bruising in dogs, how to spot the signs, and when you should take your dog to the vet.
TL;DR: Why does my dog have bruises?
If you notice a purplish patch on your dog’s skin, tiny red or purple dots on their gums, or dark marks on their belly, your dog may have a bruise.
What is a bruise? It’s bleeding under the skin from broken blood vessels, which can happen because of an injury or a problem with clotting or platelets.
Is it an emergency? Yes, especially if you don’t know what caused it. Since dogs rarely bruise without a reason, unexplained bruising should be treated as a medical emergency until your vet says otherwise.
Will it get better? That depends on the cause. Bruises from minor injuries usually fade in a couple of weeks. If there’s an underlying disorder, it needs to be treated before the bruising will go away.
What Are Dog Bruises?
A bruise happens when small blood vessels break and bleed under the skin, but there’s no open wound.
In dogs, bruises usually appear in two main forms, depending on how much and how deep the bleeding is.
Petechiae are tiny, pinpoint spots of bleeding, often seen on the gums, belly, or inner thighs. Ecchymosis refers to larger, blotchy, purplish patches that come from deeper bleeding.
This difference is important. Petechiae usually mean a low platelet count, while larger ecchymosis is often linked to trauma, a clotting problem, or an immune issue.
What Is Ecchymosis?
Ecchymosis is the discoloration you see when blood leaks from damaged capillaries and collects under the skin. It usually looks purple, blue, red, yellow, or orange and is often bigger than 1 cm across.
Unlike a regular bruise, ecchymosis only describes the visible skin discoloration from bleeding under the skin. It means blood has leaked from tiny vessels and is trapped near the surface.
Ecchymosis often happens with bruising, but it can also show up without any clear injury. If your dog has unexplained ecchymosis, take them to the vet to find out what’s causing it.
A healthy dog’s skin and coat protect them from everyday bumps, so normal play shouldn’t leave marks. If you see bruising after play, it could mean something else is wrong.
What Causes Bruising in Dogs?
Bruises form when small blood vessels under your dog’s skin get damaged and blood seeps into the nearby tissue. Usually, the body quickly clots the blood to stop the bleeding, and the trapped blood is slowly absorbed.
Dogs rarely bruise for no reason. If you see bruising and there’s no clear injury, it could mean there’s a health issue that needs attention.
Some dogs are born with clotting disorders, but most unusual bruising happens later in life due to illness, certain medications, toxins, or issues with platelets or clotting proteins.
If blood doesn’t clot as it should, even a small bump can cause a visible bruise.
These are some of the most common reasons dogs get bruises:
| Cause | Details |
|---|---|
| Trauma or injury | Falls, being hit by a car, rough play, bite wounds, or other impacts that damage blood vessels beneath the skin. |
| Thrombocytopenia (low platelets) | A reduced platelet count caused by immune-mediated disease, infections, cancer, or certain medications. This often leads to tiny pinpoint bruises (petechiae). |
| Bleeding disorders | Inherited conditions like von Willebrand disease or hemophilia, as well as acquired disorders caused by liver disease, rodenticide (rat poison), medications, or toxins. These often cause larger bruises (ecchymosis). |
| Tick-borne diseases | Infections such as ehrlichiosis, anaplasmosis, and Rocky Mountain spotted fever can reduce platelet counts and increase bleeding. |
| Vasculitis | Inflammation of the blood vessels due to autoimmune disease, infections, insect bites, or drug reactions. |
| Cancer | Diseases such as lymphoma or bone marrow disorders can interfere with platelet production or normal blood clotting. |
Certain breeds are more likely to have clotting disorders. For example, von Willebrand disease is seen more often in Doberman Pinschers, German Shorthaired Pointers, Shetland Sheepdogs, and Scottish Terriers.
Bruises can show up anywhere, but they’re easiest to see where your dog’s skin is thin or light-colored. If your dog has dark skin or a thick coat, bruises might be hard to spot until they get worse.
Check these areas for unusual purple, blue, or red discoloration:
- Gums
- The whites of the eyes
- The belly
- The inner thighs
- The genital area
If you see bruising and there’s no clear injury, or if your dog gets bruises often or they seem severe, call your vet right away. Your vet may suggest blood tests to check for bleeding problems.
What Do Dog Bruises Look Like?
The most obvious sign is a discolored patch of skin, from tiny red or purple dots to larger dark spots. Bruises are easiest to see where the skin is thin or there’s less fur.
| Symptom | What You’ll See |
|---|---|
| Petechiae | Tiny, pinpoint red or purple spots, often on the gums, belly, or inner thighs |
| Ecchymosis | Larger, blotchy purple or dark red patches under the skin |
| Bruising on the gums | Small red or purple speckling inside the mouth |
| Swelling around a bruise | Puffiness or a firm lump under the discolored area |
| Bleeding elsewhere | Nosebleeds, blood in urine or stool, or bleeding gums alongside the bruising |
| Lameness or joint swelling | Bleeding into a joint, sometimes seen with clotting disorders |
| Lethargy or pale gums | Signs the bruising may be linked to blood loss or an underlying illness |
⚠️ If you see bruising alongside nosebleeds, blood in the urine or stool, pale gums, or your dog seems weak or collapses, get to a vet immediately. These can be signs of significant internal bleeding.
Diseases That Cause Bruises
If your dog has bruises but hasn’t been hurt or eaten anything unusual, it could be a sign of illness. Your vet will run tests to find the cause and can check if the bruising is actually something harmless, like an allergic reaction.
The kind of bruising your dog has can help your vet figure out the cause. Two inherited diseases that also affect people can cause bruising in dogs:
- Hemophilia affects the body’s ability to make blood clots. The Cornell University College of Veterinary Medicine says dogs suffering from hemophilia can also often show signs of lameness and swelling because of bleeding into their joints and muscles.
- Von Willebrand disease is also a blood clotting disorder. Pet Health Network notes that this disease is seen more often in certain breeds, including German shepherds, Doberman pinschers, Scottish terriers, Shetland sheepdogs and German shorthaired pointers.
How Is Bruising Diagnosed in Dogs
Since there are many possible causes, your vet will start with basic tests and move to more specific ones if needed.
Be ready to share the following information at your appointment:
Any known injury, fall, or trauma in the days before the bruising appeared; access to rat poison, medications, or other toxins; any other symptoms like nosebleeds, blood in urine or stool, or lameness; current medications and recent vaccinations; breed and any known family history of bleeding disorders
Your vet will likely perform the following:
| Test/Exam | What It Rules Out |
|---|---|
| Physical exam | Extent of bruising, additional bleeding sites, overall condition |
| Complete blood count (CBC) | Platelet count, red and white blood cell levels |
| Manual platelet count | Confirms platelet numbers when automated counts are inconclusive |
| Coagulation (clotting) panel | Clotting factor deficiencies, rodenticide exposure |
| Tick-borne disease panel | Infections like ehrlichiosis or anaplasmosis |
| Imaging (X-ray or ultrasound) | Internal bleeding, organ involvement, tumors |
❓ Note on Costs: These figures are general estimates. Total costs vary by location, whether specialist referral is needed, and how many tests are required to reach a diagnosis.
How To take Care Of Your Dog While He Recovers
After your vet finds the cause and starts treatment, your job at home is to prevent more injuries and watch how the bruising changes.
| What to do | Why it matters |
|---|---|
| Restrict rough play and jumping | Reduces the risk of new trauma while clotting or platelet levels are still low |
| Check bruised areas daily | Helps you track whether bruises are fading or spreading |
| Watch for new bruises or bleeding | New spots can signal the underlying cause isn’t yet controlled |
| Give medications exactly as prescribed | Especially critical for immune-mediated conditions and antibiotic courses |
| Keep follow-up appointments | Bloodwork often needs to be repeated to confirm platelet counts are recovering |
| Avoid pain relievers not approved by your vet | Some human and even some pet medications can worsen bleeding risk |
⚠️ Don’t give your dog aspirin or other pain relievers without checking with your vet first. Certain medications interfere with clotting and can make bruising or bleeding worse.
Natural Ways to Help a Dog Recover From Bruises
Most bruises heal on their own, but your dog might feel sore while the area recovers. Along with your vet’s advice, some natural supplements may help keep your dog comfortable during healing.
Here are a few options to consider:
CBD Oil for Dogs may help soothe the discomfort associated with bruises by supporting a healthy inflammatory response and promoting relaxation. Many pet owners also find it helpful for keeping dogs calm while they recover from an injury.
Wild Alaskan Salmon Oil with Hemp Oil gives your dog omega-3 fatty acids, which help keep skin and tissues healthy and support a balanced inflammatory response. It won’t make bruises go away faster, but it can help with recovery and skin health.
CBD oil is the most common form of cannabidiol for dogs, but some dogs don’t like oil on their fur. That’s why Innovet offers many different CBD-infused products.
There are dog treats and soft chews for pups who like to snack, as well as CBD creams for dogs. Innovet also offers hemp CBD capsules, which are a quick way for pet owners to give cannabidiol if they don’t mind the process.
⚠️ Always speak with your veterinarian before starting CBD or any new supplement, especially if your dog has a bleeding disorder, is taking medications, or has an underlying medical condition.
Frequently Asked Questions (FAQs)
1. Is bruising in dogs an emergency
Unexplained bruising, meaning bruising without an obvious injury, should be treated as an emergency. Because dogs don’t bruise as easily as people, it often signals an underlying clotting or platelet problem that needs prompt diagnosis.
2. Can dogs bruise from normal play
Not typically. A dog’s thicker skin and coat generally protect against the kind of bruising humans get from everyday bumps. Bruising from normal play is uncommon enough that it’s worth a vet visit if it happens.
3. What’s the difference between petechiae and ecchymosis
Petechiae are tiny, pinpoint spots often linked to low platelet counts. Ecchymosis refers to larger, blotchy bruises more often associated with trauma or clotting factor disorders.
4. Can rat poison cause bruising in dogs
Yes. Many rodenticides work by blocking the body’s ability to use vitamin K, which is essential for clotting. This can cause bruising, along with more serious internal bleeding, and needs urgent veterinary treatment.
5. Which dog breeds are prone to bleeding disorders
Von Willebrand disease is seen more often in Doberman Pinschers, German Shorthaired Pointers, Shetland Sheepdogs, and Scottish Terriers. Hemophilia is less common but also has a genetic basis.
6. When should I take my dog to the vet for a bruise
Any bruise without a clear cause warrants a vet visit. Go immediately if bruising appears alongside nosebleeds, blood in the urine or stool, pale gums, lameness, or lethargy.
Disclaimer: This article is for educational purposes only and does not constitute veterinary medical advice. Always consult your veterinarian if your dog has unexplained bruising, especially alongside other symptoms.
Sources:
Bleeding Under the Skin in Dogs
Bleeding Under the Skin of Dogs
Sara Redding Ochoa, DVM was raised in north Louisiana. She graduated from LA Tech in 2011 with a degree in animal science. She then moved to Grenada West Indies for veterinary school. She completed her clinical year at Louisiana State University and graduated in 2015 from St. George’s University. Since veterinary school she has been working at a small animal and exotic veterinary clinic in east Texas, where she has experience treating all species that walk in the hospital. In her free time, she likes to travel with her husband Greg, bake yummy desserts and spend time with her 4-legged fur kids, a dog Ruby, a cat Oliver James “OJ”, a rabbit BamBam and a tortoise MonkeyMan.
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The Innovet Team
Please do not ask for emergency or specific medical questions about your pets in the comments. Innovet Pet Products is unable to provide you with specific medical advice or counseling. A detailed physical exam, patient history, and an established veterinarian are required to provide specific medical advice. If you are worried that your pet requires emergency attention or if you have specific medical questions related to your pet’s current or chronic health conditions, please contact or visit your local/preferred veterinarian, an animal-specific poison control hotline, or your local emergency veterinary care center.
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