Is That A Rash On My Dog’s Balls?


I have written another article about dog’s testicles that are red or pink.

But readers of that article are aking about another closely related issue which is bothering them.

And it is about rashes on dog’s testicles.

Even though this is a fairly common occurrence, rashes on or near your dog’s privates is a cause for concern.

Dog rash can be a minor skin irritation that can resolve on its own, but there’s also a possibility that it can worsen. 

A rash or two or your dog’s ball may be nothing serious, but when it’s accompanied by extreme itching, redness, swelling, or changes in the appearance of your dog’s scrotum, then it can be a sign of a medical condition that demands immediate medical attention.

In this article, we’ll discuss all you need to know about your dog’s groin rash, including symptoms, potential causes, and the available treatment options.

Here is what you will learn from today’s article:

  1. Why does my dog have a rash on his groin area?
  2. Six causes of a red rash on dog’s testicles
  3. What does an allergy rash on a dog look like?
  4. How long does a dog allergy rash last?
  5. Why are my dogs’ testicles red and swollen?
  6. How do dogs get brucellosis? 
  7. What are the symptoms of brucellosis in dogs?
  8. How do I treat a rash on my dog’s groin?
  9. Conclusion

Why does my dog have a rash on his groin area?

Like humans, dogs can have numerous kinds of rashes. Rashes on dogs most commonly appear on the abdomen, armpit or groin, where there is less hair and more sensitive skin.

Rashes sometimes emerge unexpectedly and then vanish just as fast. Rashes are a common symptom of several types of allergies.

Rashes on a dog’s ball or crotch are somewhat common, but they can be unsettling and distressing.

These rashes can be brought on by a variety of conditions, including dermatitis, insect bites, bacterial skin infections and more serious conditions like Cushing’s disease. 

Six causes of a red rash on dog’s testicles

There are various types and causes of red rashes on dogs balls.

The common types are often red and inflamed pimple-like lesions.

Typically, the skin around the crotch will be irritated, dry and flaky, and the dog will also keep rubbing against their groin area. 

If your dog has a rash near his privates, then here are the conditions that may be causing your dog discomfort.


Your dog may be reacting to something unpleasant in their environment. It could be an atopic dermatitis or a flea-bite allergy.

Atopic dermatitis is an inflammatory disorder that affects dogs and causes their skin to show signs of allergic reactions after ingesting or inhaling an allergen.

Symptoms of atopic dermatitis include rashes, skin redness, inflammation, skin infection, etc.

Another common cause of allergy skin reaction in dogs is insect or flea bites.

A severe allergic reaction to a flea bite is known as flea allergy dermatitis (FAD). FAD can lead to skin rashes, severe itching, and unpleasant skin sores.

Canine heat rash

Your dog can have heat rashes if they are exposed to too much heat. Heat rashes appear as boils or small rash in a confined region on the skin.

They typically occur near or underneath skin folds like the armpit, neck or groin. And the skin around that area will be tender, red, inflamed and itchy.

This prickly heat or rash may be unpleasant, irritating, and uncomfortable. If the surrounding conditions, such as the skin folds, are hot and humid, a heat rash will worsen and may become infected.

Bacterial skin infection

Bacterial infections on the skin are called pyoderma. Numerous bacterial species typically live on dogs’ skin without showing any symptoms.

However, when the right conditions are present, these microorganisms can overgrow and cause an infection. 

The most common bacteria species known to cause canine pyoderma is staphylococcus pseudointermedius.

Symptoms of pyoderma include rashes on the skin, dry or flaky skin, itching, redness, etc.

Mild discomfort to a serious and painful infection are all possible symptoms.

Canine brucellosis

This is an infectious disease caused by the bacterium, Brucella canis (B. canis). Infected dogs typically acquire a sexually transmitted illness or an infection of the reproductive system. In dogs, brucellosis typically results in reproductive issues like infertility, abortions, and other clinically significant symptoms like abnormally-sized testicles.

Yeast dermatitis

Yeast dermatitis (caused by the fungus Malassezia pachydermatis) is a very common skin disease in dogs. Although this yeast is typically found on the skin of dogs, an unusual overgrowth can result in dermatitis, or skin inflammation. Symptoms of this condition include redness, chronic itchy skin, scaly skin, hair loss, musty odour, etc. You’ll likely be able to identify this condition yourself because it makes the skin smell.

Hormonal imbalance

Rashes and recurrent skin infections can be caused by medical disorders in dogs that result in hormone abnormalities. For instance, hypothyroidism, or an underactive thyroid gland, can impair the quality of the skin. Your dog may get a rash as a result of Cushing’s illness (overactive adrenal gland).

What does an allergy rash on a dog look like?

Different dogs may experience different allergy symptoms depending on the cause.

However, an allergy rash will often appear as small red bumps or pimple-like lesions on the skin. And just like humans, dogs also get hives

Hives are a common skin rash or welts triggered by a reaction to many things, including certain foods, medication and stress.

They indicate that the immune system has overreacted in response to an allergy. Your dog might scratch a lot if they have hives or an allergy rash. 

Acute allergic reactions can cause anaphylactic shock.

A dog having anaphylactic shock will experience shock followed by a reduction in blood pressure, which is completely different from a skin disease. 

The following signs could generally point to an allergic reaction.

  • Rashes or hives
  • Facial swelling 
  • Red and inflamed skin
  • Diarrhoea
  • Vomiting
  • Sneezing
  • Recurrent ear infections
  • Itchiness and constant licking

Some of these signs and symptoms can also point to another illness. Schedule a visit with your vet to get a proper diagnosis and to aid in your dog’s recovery.

How long does a dog allergy rash last?

An allergy rash can appear suddenly and then vanish just as fast.

In minor cases, the hives and allergy rashes usually go away 12 to 48 hours after your dog made contact with the allergen.

Any time you notice hives on your dog, you should seek medical attention because there is a chance that the reaction could escalate and produce a deadly swelling of your dog’s airways or a severe allergic reaction known as anaphylaxis.

Why are my dogs’ testicles red and swollen?

Testicular swelling may have a number of different causes.

Male dogs may experience either epididymitis, an inflammation of the testicular tube containing sperm, or orchitis, an inflammation of the testes in which one or both testicles become hard and swollen.

Red and swollen testicles can also be caused by brucellosis, a sexually transmitted bacterial infection. 

When a male dog contracts brucellosis, he develops epididymitis which affects a portion of the testicles.

An enlarged scrotum or testicle, as well as a skin rash on the balls, are common in dogs with this bacterial infection. In persistent or chronic conditions, the testicles will shrink. 

Brucellosis also affects female dogs, inwhich case they will develop an infection of the uterus, making them infertile, difficult for them to become pregnant, or even leading to an early abortion, if she’s already pregnant.

Female dogs with brucellosis will experience ongoing vaginal discharge. 

Both male and female dogs with this infection become infertile.

Canine brucellosis is one of the primary causes of infertility in dogs.

It can spread from dogs to humans and affects all breeds of dogs, both purebred and mixed.

How do dogs get brucellosis?

Brucellosis is spread by contact with contaminated fluids, particularly during breeding or childbirth.

Dogs of any breed or age can contract brucellosis, but older dogs are more frequently affected.

Infection can spread through sexual contact or by the consumption of infected products.

It seems that both genders are equally vulnerable and it spreads quickly among dogs kept in small spaces.

Isolating diseased dogs prevents the spread of the virus.

Testing a dog for brucellosis before breeding and entering breeding facilities is one way to prevent the disease.

What are the symptoms of brucellosis in dogs?

Your dog may display some of the following symptoms if they have brucellosis:

  • Lethargy
  • Trouble walking
  • Enlarged lymph nodes
  • Vagina discharge
  • Frail newborn puppies
  • Enlarged testicles
  • Red rash on dog balls
  • Skin inflammation around the scrotum

A blood test is typically used to diagnose the infection.

Antibiotics can help control the infection, but no treatment is 100% successful in getting rid of the disease, therefore any dog who has been exposed to B. canis should be regarded as permanently sick.

Antibiotics may be able to manage the acute illness, but the dog may continue to repeatedly shed bacteria for the remainder of their life.

Successful treatment of brucellosis may involve using long-term antibiotics. 

It is crucial to take your dog to the vet right away if you think he or she may have contracted Brucella, because the infection is very contagious.

How do I treat a rash on my dog’s groin?

Treatment for rash on your dog’s groin or testicles will vary depending on what caused it.

However, you may first consider some natural and healthy remedies as first aid treatment.

Eliminating all forms of environmental allergies is a good place to start.

Sometimes (like with a little bug bite) the rash may disappear without treatment.

But if this isn’t the case and you find your dog in so much discomfort with itchiness and redness, consult your vet for a thorough examination and proper diagnosis. 

There are veterinarian treatments available for rashes that don’t go away on their own. For instance, your vet may recommend:

  • Antibiotics to treat bacterial infections
  • Antifungal pills or creams for yeast infections
  • Prescription medicated shampoos
  • Medications that kill external parasites, etc. 


If your dog gets rashes on his balls, he may be suffering from a skin inflammation caused by an allergic reaction, insect bite, injury or an infection. 

If there is just a single rash or one small area of redness, it might just be a little skin irritation or a simple bug bite that will resolve on its own in a few days. 

Most of the time, mild itching doesn’t indicate a serious health issue.

However, if the rash spreads and gets worse or your dog develops other symptoms like lethargy, anxiety or loss of appetite, take them to the vet right away.

A close examination by the vet will reveal if the rash is caused by an underlying illness. 

James Grayston

My name is James and I love dogs. have owned four Golden Retrievers in the past 15 years. Currently I own two "Goldies"- a five year old and a seven month old. The photo shows me with our youngest when she was about 7 weeks old!