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Skin allergies in dogs

Find out what can cause skin allergies in dogs, how to spot the signs and what you can do to help ease your dog’s discomfort. You’ll also learn about treatment options and when pet insurance may help with the cost of care.

Skin allergies are one of the more common health problems in dogs, causing symptoms like itching, redness and recurring skin issues.

As allergies often need ongoing investigation and treatment, having dog insurance may help with eligible veterinary costs.

What are skin allergies in dogs?

Skin allergies happen when your dog's immune system overreacts to a normally harmless substance. This reaction can cause inflammation, itching and irritation of the skin.

Allergies can be challenging to diagnose because many different conditions can cause similar symptoms. Your vet may need to rule out other causes, such as parasites or infections, before confirming an allergy.

What causes skin allergies in dogs?

Skin allergies are caused by an overactive immune response to certain substances, known as allergens. Some common triggers include:

  • Flea saliva
  • Ingredients in food, often certain proteins
  • Environmental allergens, such as pollen, dust mites or mould
  • Substances that come into contact with the skin, such as certain materials or chemicals

Some dogs may be more likely to develop allergies because of their genetics, but any dog can be affected

Which dog breeds are more prone to skin allergies?

Any dog can develop skin allergies, but some breeds appear to have a higher risk of developing allergic skin disease. Some breeds that may be more commonly affected include:

It’s worth noting that having a breed that’s more commonly affected doesn’t mean your dog will definitely develop allergies.

Types of skin allergies in dogs

There are several types of skin allergies that can affect dogs, including flea allergy dermatitis, food allergies, atopic dermatitis caused by environmental allergens, and contact allergies.

  • Flea allergy dermatitis (FAD)

    Flea allergy dermatitis happens when a dog reacts to flea saliva. Some dogs can develop intense itching from just a small number of flea bites. The lower back, tail area and thighs are often affected.

  • Food allergy

    Food allergies occur when a dog's immune system reacts to an ingredient in their diet. Dogs are often affected by proteins, such as those found in certain meats or other animal products. Food allergies can cause itching throughout the year and may also be linked to recurring ear infections or digestive symptoms.

  • Atopic dermatitis

    Atopic dermatitis is an allergy to environmental substances, such as pollen, dust mites or mould. Dogs with atopic dermatitis often experience itchy skin, particularly around the paws, ears, face, armpits and groin.

  • Contact allergy

    Contact allergies occur when a dog's skin reacts after coming into contact with a particular substance. These are less common than other types of allergies.

Symptoms of skin allergies in dogs

The most common symptom of a skin allergy is itching. However, signs can vary between animals. Other symptoms of skin allergies in dogs may include:

  • Scratching or rubbing the skin
  • Licking or chewing paws
  • Red or inflamed skin
  • Hair loss or thinning fur
  • Recurrent ear infections
  • Repeated skin infections
  • Scabs or sores
  • Changes to the skin, such as thickening or darkening caused by ongoing irritation
  • Rubbing the face or ears
  • Restlessness or changes in behaviour due to discomfort

Some dogs may also develop digestive symptoms, particularly if they have a food allergy.

What should you do if your dog shows signs of skin allergies?

Speak to your vet if your dog has ongoing itching, recurring skin infections or repeated ear problems. Your vet will usually investigate other possible causes first, as several conditions can look similar to allergies. These may include fleas, mites, bacterial infections or yeast infections.

If allergies are suspected, your vet may recommend further investigations, such as a strict elimination diet to check for food allergies.

At what age can dogs develop skin allergies?

Dogs can develop skin allergies at any age, but many dogs first show signs when they’re young adults. Some dogs may experience symptoms throughout their lives, while others may have flare-ups that come and go.

How can you manage skin allergies?

While many skin allergies usually can’t be cured, they can often be managed with the right treatment plan. Management may include keeping your dog protected against fleas all year round, identifying and reducing exposure to known allergens where possible, following veterinary advice about diet changes, and using suitable veterinary products for bathing.

Quickly treating skin infections and reducing exposure to environmental triggers where practical can also help. Because allergies can change over time, your dog's treatment plan may need regular review.

Does pet insurance cover skin allergies?

Pet insurance may cover some costs associated with diagnosing and treating skin allergies, including Agria lifetime dog insurance, but this depends on your policy and your dog's circumstances.

Many policies don’t cover pre-existing conditions. This means signs of allergies that were present before your policy started may not be included. Some insurers may also require evidence of routine preventative care, such as flea treatment, depending on the circumstances of a claim. Always check your policy documents to understand what is and isn't covered.

Because allergies can come and go throughout your dog’s life, lifetime cover can help with eligible costs like tests, treatment and medication if your dog needs ongoing care.

Skin allergy treatment options

Treatment depends on the type of allergy and how severe your dog's symptoms are. Your vet may recommend flea treatment if flea allergy dermatitis is suspected, an elimination diet trial for possible food allergies, or medication to reduce itching and inflammation.

Treatment may also include managing secondary bacterial or yeast infections, using special shampoos or topical treatments, or creating a long-term allergy management plan for conditions such as atopic dermatitis. Some dogs with environmental allergies may also benefit from allergy immunotherapy (a treatment that helps dogs become less sensitive to allergens).

Many dogs need a combination of treatments to help keep their symptoms under control.

When to speak to a vet

Contact your vet if your dog has persistent itching, repeated ear infections, recurring skin infections or changes to their skin or coat. You should also seek advice if your dog is licking, chewing or scratching excessively, seems uncomfortable, or develops sores, scabs or hair loss.

Early diagnosis can help identify the cause of your dog's symptoms and improve the chances of effective long-term management.


Written by
Adam Jolley
Last reviewed on

About the Author

Adam Jolley is a writer specialising in insurance, personal finance, and pets. He’s worked for Confused.com and Admiral Insurance, and currently writes and edits for an online magazine. His strangest pet was a hissing cockroach. Now, he’s a proud cat dad to Penelope, affectionately known as Nelly.

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