Pet Allergies & Skin Disease: Signs, Causes & Treatment

Itchy skin, dirty ears, and recurring skin problems are some of the most common reasons dogs and cats visit the veterinarian. While allergies are a common cause of itching, there are many other conditions that can cause similar symptoms, including bacterial or fungal infections, hot spots, fleas, and other skin parasites.

Because these conditions can look very similar, the best way to determine what is causing your pet's itching is with a thorough veterinary examination. Identifying the underlying cause is an important first step toward helping your pet feel comfortable and preventing recurring skin problems.

Common Signs of Allergies in Dogs and Cats

Allergies can look different from one pet to another, and the signs may sometimes be mistaken for an infection or parasite problem.

In dogs, common signs of allergies and allergic skin disease include:

* Licking or chewing the paws
* Scratching the skin
* Chewing at the belly or around the base of the tail
* Shaking the head
* Scratching or rubbing the ears
* Recurrent ear infections
* Red, irritated, or inflamed skin

In cats, allergies can be a little more difficult to recognize. Cats often respond to itching by excessively grooming themselves, which can result in thinning or missing hair. Hair loss and irritation may be particularly noticeable around the face, ears, neck, and other areas of the body.

Because these signs can also occur with infections, fleas, mites, and other skin conditions, it is important to have your pet examined rather than assuming allergies are the cause.

What Are Pets Allergic To?

Dogs and cats can develop allergies to a variety of substances in their environment, as well as certain ingredients in their food.

Environmental Allergies

In the Pacific Northwest, pets may encounter many potential environmental allergens, including:

• Grasses
• Pollens
• Trees and plants
• Dust mites
• Other environmental particles

Pets can also develop irritation or sensitivity to products found in the home, such as laundry detergents and fabric softeners.

Environmental allergies can cause chronic or recurring itching, and symptoms may become more noticeable during certain times of the year.

Flea Allergy Dermatitis

Flea allergy dermatitis is another common cause of itchy skin in dogs and cats. Pets with this condition develop an allergic reaction to substances in flea saliva after being bitten.

Importantly, a pet does not need to have a large flea infestation to experience a reaction. Even occasional flea exposure can cause significant itching in a sensitive pet.

Flea allergy dermatitis can also contribute to hair loss, skin irritation, and secondary bacterial or yeast infections. Because fleas can be present throughout the year, consistent flea prevention is an important part of managing allergic skin disease.

This is true even for indoor pets, since fleas can make their way inside homes and other animals in the household can also bring them indoors.

Food Allergies

Food allergies can cause itching and other skin problems in dogs and cats, but they are less common than many pet owners realize. Food allergies are only one possible cause of allergic skin disease, which is why a veterinary examination is important before assuming that your pet's food is responsible.

When food allergy is suspected, your veterinarian may recommend a carefully controlled food elimination trial. A true food allergy can only be reliably confirmed through an appropriate elimination diet followed by a controlled dietary challenge.

Pets with food allergies can react to a variety of proteins. In dogs, commonly reported food allergens include beef, dairy, chicken, wheat, and lamb. In cats, beef, fish, and chicken are among the more commonly reported allergens.

Because food allergies can look very similar to environmental allergies, flea allergies, and other causes of itching, your veterinarian will typically consider your pet's complete history and clinical signs before recommending a diet trial.

Why Over-the-Counter Treatments May Not Work

There are many over-the-counter products marketed to help with itching and allergies in pets. While some products may provide temporary relief, they may not address the underlying cause of your pet's skin problems.

For example, allergic skin disease can occur alongside bacterial or yeast infections, fleas, or other parasites. These underlying problems need to be identified and treated for your pet to experience lasting improvement. Veterinary guidelines recommend evaluating for parasites and secondary infections as part of the workup for itchy pets.

What About Coconut Oil?

Coconut oil is sometimes recommended as a home remedy for irritated skin. However, applying oils to already irritated skin may trap moisture and potentially worsen certain skin infections or irritation.

Coconut oil can also cause gastrointestinal upset if your pet consumes a large amount. For these reasons, it is best to talk with your veterinarian before applying home remedies to irritated or inflamed skin.

Long-Term Management of Pet Allergies

Unfortunately, allergies are often a condition that needs to be managed rather than permanently cured. Long-term management depends on your pet's specific symptoms, underlying causes, and allergy triggers.

Treatment may include a combination of veterinary-prescribed medications, parasite prevention, treatment of secondary infections, skin care, dietary management, and changes at home.

A multimodal approach is often necessary because pets can have more than one factor contributing to their itching.

When Should Your Pet See a Veterinary Dermatologist?

Many primary care veterinarians diagnose and manage allergic skin disease on a regular basis. However, some pets have chronic, recurring, or complicated skin problems that require additional support.

A board-certified veterinary dermatologist may be recommended when your pet's skin disease is difficult to control, keeps returning, or requires more advanced diagnostic or treatment options.

Our goal is to help your pet get comfortable and keep their skin healthy. If your pet continues to struggle despite treatment, we can help determine whether a referral to a veterinary dermatologist would be beneficial.

What Can You Do at Home to Help Pet Allergies?

While there isn't usually an over-the-counter product or home remedy that can eliminate allergies completely, there are several things you can do at home to support your pet's skin health alongside their veterinary treatment plan.

Support Healthy Skin With Omega-3 Fatty Acids

Omega-3 fatty acids, particularly EPA and DHA from fish oil, can support healthy skin and coat function. Your veterinarian can help you determine whether an omega-3 supplement is appropriate for your pet and recommend an appropriate product and dosage.

Bathe Your Pet as Recommended

Bathing can help remove allergens, pollen, and debris from your pet's skin and coat. Medicated shampoos may also be recommended for pets with certain skin infections or allergic skin disease.

Depending on your pet's condition, your veterinarian may recommend products such as MiconaHex, Douxo PyoS3, or Suffusion K.

During an active flare-up, some pets may benefit from bathing once or twice a week. However, the appropriate frequency depends on your pet's skin condition and the products being used.

Avoid heavily scented products and flea shampoos unless specifically recommended by your veterinarian, as some products may further irritate already inflamed skin.

If your pet's skin or itching is not improving with bathing and other recommended care, it is time to schedule a veterinary appointment.

Wipe Your Pet's Paws and Belly After Going Outside

Wiping your pet's paws and underside after time outdoors can help remove pollen, grass, and other debris from the skin.

A clean, damp washcloth or an unscented pet-safe wipe can be used for this purpose. Keeping the hair around the feet trimmed short may also make it easier to thoroughly clean the paws.

Help Break the Itch-Scratch Cycle

When pets are itchy, scratching, licking, and chewing can further damage the skin. This can create a cycle of itching, inflammation, and additional skin trauma.

An Elizabethan collar, commonly called an e-collar or cone, can help prevent your pet from chewing or scratching irritated areas while their skin heals.

Helping Your Pet Find Relief

Allergies and skin disease can be frustrating for both pets and their families, especially when symptoms keep coming back. The good news is that there are many ways to manage allergic skin disease and help your pet feel more comfortable.

If your dog or cat is frequently scratching, licking, chewing, shaking their head, or developing hair loss or irritated skin, don't assume that allergies are the only possible cause. Schedule an appointment with your veterinarian so they can identify the underlying problem and create an appropriate treatment plan for your pet.

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