Why does my dog have a rash on his inner thigh?

There are many reasons why your pup might have irritated, itchy skin. One reason can be a dog rash. Read on for common causes of a rash, plus treatments and tips for avoiding these skin issues.

Why does my dog have a rash on his inner thigh?

If your dog is scratching without relief, chances are there’s a skin problem that’s not going to disappear on its own. Like humans, your dog’s skin is an important barrier between the outside world and the body’s organs. Also like humans, your dog’s skin can be sensitive and prone to irritation by forces both internal and external. You’ll see the signs: redness, raised bumps, hives or even blisters. The good news is that treating the rash can be a simple and pain-free process – for you and your pet. And once cared for, there are plenty of grooming practices you can put in place to reduce the risk of the rash returning. A dog’s rash can be caused by everything from environmental irritants (heat, poison ivy, other plants) to allergies, parasites and skin infections. Genetics, inflammatory conditions and hormone imbalances can also cause dog rash, and if you suspect any of these – or can’t identify the cause of the rash – you should seek veterinary advice immediately. Temperatures can soar across Australia during the summer months, and while all dogs feel the heat, some are more susceptible to heat rash than others, in particular overweight dogs and those with large wrinkles of skin. While heat rash can present like a number of other common rashes, symptoms to look out for include tender and red skin (usually in skin folds and on the belly), scabs and sores, continuous licking and scratching, itchy and irritated skin, and small pimples in a concentrated area. If the heat rash is minor, you can ease irritation by cooling down the area impacted. Apply a cold compress or a bag of ice to the rash (make sure there’s a towel in between the skin and the ice) for around 10 minutes, to reduce the sting. Aloe vera is also cooling and healing, and when applied in gel form can give immediate relief.

Simple – keep your dog cool and hydrated. Dogs naturally have a higher body temperature than humans, plus they’re walking around all day with a fur coat on. It’s not surprising they overheat quickly.

To avoid heat rash:

  • limit the amount of time your dog spends in the sun, particularly over summer
  • walk your dog in the shade or during the coolest part of the day
  • splash your dog with water
  • make sure water bowls are full
  • if you notice panting and fatigue, bring your dog inside to a cool, dry place

What is dog allergy rash, and how can I treat it?

Just like us, dogs can suffer from all manner of allergies – some of which present their symptoms in the form of a rash. The most common allergies are:

Flea allergy dermatitis

This common skin disease can be brought on from having just one or two fleas on the skin. In this case, prevention is the best treatment: make sure your pet is up-to-date with flea treatments. If you do notice a reaction (usually open, oozing sores), your vet may recommend an aggressive spot-on flea treatment as well as antibiotics or topical creams.

Atopic dermatitis

This is a hypersensitive reaction to indoor and environmental allergens, from pollens and dust mites to mould spores. You’ll usually see it flare up in warm, moist parts of your dog’s body, like the groin or around the eyes. Again, prevention is the best way to make sure your pooch avoids these rashes – remove allergens from the environment, or change environments.

To treat atopic dermatitis, long-term management is needed. There are three main strategies to do this:

  1. 1. Remove the allergens from the skin
  2. 2. Manage the infection and inflammation
  3. 3. Repair the skin barrier

Regular shampooing with mild medicated or soothing shampoos such as PAW Mediderm Medicated Shampoo or PAW NutriDerm® Replenishing Shampoo, can help to treat any discomfort. In addition, the skin can be moisturised using rich conditioners containing ceramides such as PAW NutriDerm® Replenishing Conditioner.

  • Food allergy dermatitis. This is less common, and is ignited by food intolerances. Talk to your vet about food elimination trials to work out what, exactly, is causing the irritation and rash.
  • Mange, which is initiated by two types of mites. Your vet may recommend isolating your pet, and prescribe certain medications. At home, you can manage any secondary skin irritation by using sulphate-free shampoos and conditioners, like PAW Sensitive Skin Shampoo and PAW Conditioning and Grooming Spray. There are also supplements available, such as PAW Dermega Omega 3 & 6 Oral Supplement, which contains fatty acids that aid in the treatment of inflamed skin conditions.
  • Hot Spots. These can be caused by irritants such as infections, wounds and fleabites, aggravated by your dog chewing at the skin. Vets will trim the coat around the hot spot, clean the area, soothe it with a cool compress, and apply a topical cream to treat the rash.

What is stinging nettle rash on dogs?

The stinging nettle lives up to its name – this plant is covered in thousands of tiny hairs, which break off and inject a histamine into dogs (and humans) when rubbed against. If the contact is external only, the toxicity can lead to redness, swelling and intense itching.

How to treat the irritation?

Thankfully, most contact with stinging nettles results in a rash only. If you encounter this, gently wash your dog’s skin at the point of contact, and gently scrape the pads of feet to remove embedded nettles if you suspect your pet stepped on the plant.

If your dog is having a more intense reaction to the contact, or if you suspect it ingested the nettles, see a vet immediately.

How can I avoid my dog getting it?

Become familiar with the plants in your backyard and neighbourhood – know what is growing in the gardens and parks you walk your pooch through every day.

Can I get a rash from my dog?

While you can’t catch a cold from your dog, there are some rashes that can be passed on from animals to humans. If your dog has a rash from hookworms or ringworms, has a tick, or has come in contact with plant irritants, then you may also be susceptible to skin infections and irritations.

Can I prevent dog rash in the long term?

One of the best ways to prevent dog rash caused by external irritants is to make sure your pooch is well groomed. Take the time to bathe your dog frequently (how often will depend on the breed). Use a dog-specific shampoo, like PAW Sensitive Skin Shampoo, which is sulphate free, gentle on your dog’s skin, and rich in natural oils and moisturising ingredients. Conditioners that leave your dog's skin highly moisturised, like PAW Conditioning and Grooming Spray, can be used after bathing to add an extra dose of essential oils to your dog’s skin and coat.

Skin problems are among the most common reasons dogs end up at the veterinarian’s office.

A dog’s skin condition can have a wide range of causes, from external parasites like fleas and mites, to allergies and serious endocrine disorders.

While some dogs’ skin conditions can be treated at home, any worsening skin issue or one that continues beyond one or two weeks without improvement is a good reason to head to your veterinarian.

Here are some telltale signs of common skin problems for dogs and what could be causing them.

Common Signs of Skin Problems for Dogs

Find out what could be causing your dog’s skin condition and what you can do about it.

Rash (Commonly on the Belly)

A rash (redness or irritation) can occur on any part of your dog’s skin but is commonly seen on the belly. Common causes of a dog’s belly rash are:

  • Contact dermatitis, which is a reaction to coming into contact with something irritating like poison ivy, fertilizer, or lawn chemicals

  • Insect bites

  • Allergies

If contact dermatitis is suspected, wash the affected skin to remove any of the irritant that may still be present.

For a rash caused by insect bites that doesn’t appear to be bothering your dog, no treatment is necessary. The spots should go away on their own.

For a rash caused by insect bites or allergies that is bothering your dog, give your dog a cool bath using a dog shampoo containing colloidal oatmeal. Contact your veterinarian if the rash persists.

Scabs

Scabs, or crusting of the skin, can be the primary problem, or it can occur after a short-lived pustule (or pimple) pops and crusts over. Scabs on dogs can be caused by:

  • Puppy impetigo

  • Ectoparasites (mites and fleas)

  • Pyoderma (skin infection; wrinkly dog breeds can have skin fold pyoderma)

Treatments will differ, but they may include medicated shampoos or ointments, and possibly oral antibiotics or an antiparasitic medication.

Red Spots

Red spots on a dog’s belly during the late spring and early summer can be caused by black fly bites. These flat, red spots typically do not bother dogs and can be left untreated.

Black fly bites can be confused with ringworm spots, which do require treatment in the form of topical or oral antifungals.

Black fly bites will appear suddenly, be accompanied by other bites, be confined to the belly, and not bother the dog.

Ringworm, on the other hand, can appear anywhere, may or may not irritate your dog, and usually starts in one area as opposed to several areas appearing at once.

Small Red Bumps

Raised red bumps can be caused by several different things. If the bumps are smaller and include crusts, they may be caused by a bacterial or fungal skin infection called folliculitis. This is typically treated by your veterinarian with oral antibiotics and possibly with medicated shampoos or ointments.

Large Red Bumps

If the bumps are larger and flatter with no crusting, they may be hives caused by an allergic reaction. They are usually treated with an antihistamine and/or steroids. While usually not life-threatening, the swelling caused by an allergic reaction can obstruct the airway, so it’s important to contact your veterinarian immediately.

Redness/Irritated Skin

Along with itching, redness and irritation are often the most common signs of allergies in dogs. Finding the cause of the allergic reaction, whether it’s to a food, fleas, or something in their environment, is the most effective way to treat the irritated skin.

While the root cause is being discovered, and to give your dog temporary relief, a gentle oatmeal dog shampoo or oatmeal bath can be used to soothe and hydrate the skin.

Hot Spots

A hot spot is a moist, irritated area of skin, usually with hair matted over it. Hot spots are caused by excessive licking or chewing of an area. The excessive licking introduces bacteria to traumatized skin, causing the hot spot.

Hot spots are more common in hot, humid climates and will sometimes arise after a dog has been exposed to moisture from swimming or muddy/rainy weather. They are also more common in dogs with a dense undercoat.

Uncomplicated hot spots can be treated by carefully clipping the area to allow the skin to breathe and cleaning the area with a diluted chlorhexidine solution. You can prevent hot spots by keeping your dog groomed and drying them after swimming or being in the rain.

Dry/Flaky Skin

Flaking of your dog’s skin can be caused by more serious conditions like seborrhea, where a dog produces too much sebum, or cheyletiellosis, a condition caused by a mite that’s also known as “walking dandruff.”

But these flakes can also simply be a sign of dry skin. Ensuring that your dog is fed a good-quality food that is high in omega-3 and omega-6 fatty acids is a good first step in maintaining their skin health. If the flaking continues, consult your veterinarian.

Itchy Skin

The two main causes of itchy skin are allergies and external parasites like fleas and mites.

Allergies

Itchiness due to allergies usually involves a dog’s feet, armpits, flank, ears, and groin. Mild allergies or itchiness can be treated with a soothing dog shampoo containing oatmeal. Switching your dog to a sensitive-skin diet (which often contain fish as the main protein source and are high in omega-3 and omega-6 fatty acids) can also help.

External Parasites

Fleas will more commonly cause itchiness at the base of the tail, on the stomach, and along the inner thighs. Itchiness due to fleas and mites (that cause sarcoptic mange) will needed to be treated with medications specific to the type of parasite, such as a flea preventative.

Hair Loss/Bald Patches

The causes of hair loss, excessive shedding, or bald patches in dogs are extremely varied, including:

  • Allergies

  • Ectoparasites like fleas and mange mites (demodectic mange)

  • Cushing’s disease

  • Pressure sores, most often seen in large breed dogs, will cause hair loss at bony pressure spots like the elbow

  • Genetics

  • Stress

  • Poor nutrition

Most causes of hair loss in dogs require a trip to the veterinarian to diagnose the cause. If you suspect pressure sores, ensuring your large breed dog has a cushioned place to lie down can help prevent the pressure sores.

Sores 

Sores that do not have an obvious cause or are not healing properly could be the sign of a serious underlying condition such as cancer or another disorder that is preventing proper healing. These areas should be kept clean and seen by your veterinarian.

Dark Spots

Dark spots, or hyperpigmentation, can be secondary to chronic inflammation, in which case, they can clear up (slowly) if the underlying condition is treated. Dark spots on dogs can also indicate a hormone-associated disorder or be a sign of skin damage from the sun, trauma, or constant friction.

See your veterinarian to diagnose the underlying cause of dark spots.

Featured Image: iStock.com/mladenbalinovac

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