what does it mean when a male dogs nipples are swollen

What Does It Mean When A Male Dog’s Nipples Are Swollen? Solution – 2022

Have you ever noticed that your male dog’s nipples are swollen? If so, you may be wondering what does it mean when a male dog’s nipples are swollen, Right?

So, your pup may be experiencing breast syndrome also known as gynecomastia. It’s common in male dogs and there are many different causes, including skin irritation or severe stomach upset but it could also point to anemia, mastitis (a condition where the milk ducts become infected), or even cancer. So if you notice any strange behaviors from him like increased interest in females then take him to see a vet immediately!

In this post, we’ll discuss the causes and treatment options for nipple swelling in male dogs, and also how to prevent this condition. 

What Does It Mean When A Male Dog’s Nipples Are Swollen?

Male dogs can suffer from nipple swelling, the breast tissue could swell up. They may even feel like small lumps under the skin. But, it’s important to note that when a dog has nipple swelling, it is no cause for alarm; it does not necessarily mean they have contracted an illness.

The breasts may look swollen and feel different because of changes in hormones. Although it is possible for dogs to get breast cancer in their nipples, this is not very common. However, if you notice any other symptoms alongside the nipple swelling, it’s important to see a vet as soon as possible.

What Could Be The Causes Of Swollen Nipples In Male Dogs?

There are several possible causes for swollen nipples in male dogs. Some of these include:

Skin Irritation Or Infection 

When your dog’s skin becomes irritated, it may swell up and become inflamed. Dogs with allergies often have puffy skin that leads to swollen nipples. Other types of infections can also lead to nipple inflammation. If you notice that your dog’s nipples are red, swollen, and hot to the touch, they may have an infection.

Hormonal Changes 

A male dog’s nipples may become swollen when there is a change in their hormones levels. This can happen during puberty or if exposure to certain types of chemicals causes the hormone levels to go out of whack.


Although tumors are a rare cause of nipple swelling in male dogs, they can occasionally happen. If you notice that your dog’s nipples have become swollen and there is a bump underneath the skin, it could be a tumor.


Although cancer is rare in dogs, it’s important to be aware of this as a possible cause of nipple swelling. If you notice any changes in your pup’s nipples or if there are other symptoms present alongside nipple swelling, it’s important to take them to the vet immediately.

Enlarged Lymph Nodes

If your dog has swollen lymph nodes in their neck or groin area, this can cause breast tissue to become swollen as well.


If your dog has anemia, they may have low red blood cell counts that aren’t allowing proper oxygen to reach their cells. This may cause their nipples to swell as well as other symptoms such as pale gums and fatigue.

Severe Stomach Upset

If your dog has severe stomach upset, gas and vomiting, this can lead to nipple swelling and inflammation. When food moves too quickly through your pup’s gastrointestinal tract, it can lead to inflammation.

Chewing On Their Nipples

Some dogs actually chew on their own nipples when they are feeling restless or bored. This is often considered a type of puppy teething behaviour that goes away as she gets older.

Other Infections

If your dog has another kind of infection, it may cause the skin beneath its nipples to swell up. Some of these infections include kennel cough, Lyme disease, and even flystrike.

Birth control medication

If you are giving your dog birth control medication, this can lead to nipple swelling as well as other side effects such as weight gain or fatigue. Your vet can give you more information about this.

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How Do You Treat Swollen Nipples In Male Dogs?

There are a few methods by which you can treat the swollen nipples in male dogs which are the following:


If your dog has a severe infection, antibiotics can knock it out. Once the infection is gone, the nipple swelling will resolve itself over time

Eliminate Other Causes

If your dog’s nipple swelling is due to another health condition such as anemia or cancer, you will need to treat this first before the nipple swelling goes away. Once it is gone, the nipple swelling will also disappear.


If your dog has mastitis, you will need to give them anti-inflammatory medications to reduce the swelling. Your vet can recommend an antibiotic that will be effective for your pup’s specific type of mastitis.


You can also have your dog’s nipple removed via a mastectomy. This is the most common option for dogs that have small tumours in easy to reach areas, but it’s important to note that dogs’ nipples are often used for cancer detection. Therefore, if your pup has had a mastectomy before, this may pose an issue in the future when you notice nipple swelling.

Nipple Removal 

If your dog has extremely enlarged nipples or tumors, you may need to remove the area entirely. This is a good option for dogs that have small tumors in hard-to-reach areas where it would be difficult to treat with medications.

Other Surgical Options 

Depending on where the tumor is located, you may need to have your dog undergo other types of surgery for treatment. For example, if it is in an area that can’t be reached with a mastectomy, you may have to have the tumor removed through a different type of surgery.

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What Are Some Tips For Preventing Swollen Nipples In Male Dogs?

The following tips can be applied in order to prevent swollen nipples:

Treat Underlying Infections 

If your dog has other infections, it’s important to treat these first in order to prevent nipple swelling.

Exercise Regularly 

Exercising can help regulate hormone levels and reduce stress for your pup. This will also strengthen the immune system and help them fight off any current or future infections that may be causing nipple swelling.

Ensure Proper Circulation 

If your dog has low blood pressure, this may be causing their nipples to swell as well as other symptoms such as fatigue and pale gums. Ensuring your dog is getting the right amount of exercise and rest will help them overcome this problem.

Eliminate Allergens

Allergens can also lead to nipple swelling so you will need to check your dog’s bedding, collar, and leash for any possible allergens.

Keep Track Of The Male Dog’s Nipples 

You should keep a close eye on this area for any new lumps or bumps that may appear. If you notice anything suspicious, take him in for a check-up.

Monitor Your Dog’s Diet 

Ensure you are feeding him the right type of food that is healthy for his body and size. This will help prevent any new infections or health problems from arising.

Take Your Male Dog In For Regular Checkups 

Even if he appears to be acting fine, it’s important to take your dog to a vet for a checkup on a regular basis. This will help catch any health issues before they become serious problems.

Keep Male Dogs Indoors 

Keeping male dogs indoors can help prevent any possible diseases from being transmitted from other animals. If he must be outside, make sure you have him vaccinated against rabies and distemper.


What does it mean when a male dog’s nipples are swollen? So in short, your male dog’s nipples may appear swollen for a variety of reasons. If the nipple is a white or gray colour and is somewhat firm, there is a chance it could point to cancer so you will need to have him checked out by a veterinarian immediately.


What are some possible reasons for a male dog’s nipples to become swollen?

The most common reasons are infections, growths, allergies, or poor circulation. You will need to have him checked out by a veterinarian in order to determine the underlying cause.

Why do male dogs have nipples anyway?

Nipples are used for breeding. Males will often have enlarged nipples if they are in heat or close to it, which can indicate that they are ready to mate with females.

Why do male dogs become aggressive after their nipple is swollen?

Male dogs may be more aggressive when their nipples are swollen due to increased levels of testosterone in the body.

Are there any risks associated with swollen nipples in male dogs?

There are no risks associated with male dogs having swollen nipples unless it’s due to an underlying health issue.

When do male dogs get breast cancer?

It is rare for male dogs to develop breast cancer but it does happen so if your pet has swollen nipples and you notice anything else unusual or if their condition doesn’t seem right then take them to see a vet immediately.

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