Allergic dermatitis in dogs is one of the most common skin conditions affecting our canine companions. If your dog is constantly scratching, licking their paws, rubbing their face, or suffering from red, inflamed skin, allergies may be the underlying cause.

Understanding what triggers allergic dermatitis — and how to manage it effectively — can help your dog feel more comfortable and prevent long-term skin damage.

What Is Allergic Dermatitis in Dogs?

Allergic dermatitis in dogs occurs when the immune system overreacts to an allergen, triggering inflammation in the skin. This reaction causes the body to release histamine, leading to itching, redness, swelling and discomfort.

Common allergens include:

Environmental triggers such as pollen, grass, mould and dust mites

Flea saliva (flea allergy dermatitis)

Food proteins

Household products like detergents or cleaning sprays

For many dogs, allergic dermatitis is a chronic condition that requires ongoing management rather than a one-time fix.

Common Symptoms of Allergic Dermatitis in Dogs

Dogs with allergic dermatitis may show:

Persistent itching and scratching

Red, irritated or inflamed skin

Hot spots or scabs

Excessive licking or chewing (especially paws)

Ear infections or head shaking

Hair loss or thinning coat

Left untreated, constant scratching can break the skin barrier, allowing bacteria and yeast infections to develop.

Treating Allergic Dermatitis in Dogs

Treatment focuses on reducing inflammation, controlling itching and supporting the skin barrier. Depending on severity, vets may recommend a combination of medical and supportive care.

Are Antihistamines Effective for Allergic Dermatitis in Dogs?

An antihistamine for dogs is often used to help manage mild to moderate allergic dermatitis. Antihistamines work by blocking histamine — the chemical responsible for itching and inflammation during an allergic reaction.

Common Dog Antihistamine Options:

Cetirizine (Zyrtec) – Often considered one of the best antihistamines for dogs due to fewer sedative effects

Loratadine (Claritin) – A non-drowsy option for some dogs

Diphenhydramine (Benadryl) – Can help itching but may cause drowsiness

While antihistamines don’t work for every dog, they can reduce itchiness and flare-ups when used under veterinary guidance.

 Always consult your vet before giving any dog antihistamine, as dosing depends on weight and not all formulations are pet-safe.

Key Skin-Supporting Ingredients That Help Dogs with Allergic Dermatitis

Targeted nutrition plays an important role in managing allergic dermatitis in dogs, especially when it comes to calming inflammation, supporting the immune system and strengthening the skin barrier.

High-quality, functional ingredients can help reduce itchiness and improve overall skin resilience over time.

Here’s how these key ingredients work together to support dogs prone to allergies:

Australian-sourced salmon – Naturally rich in omega-3 fatty acids, including EPA and DHA, which help calm inflammation, reduce skin irritation and support a healthy, glossy coat.

Omega-3 fatty acids (EPA & DHA) – Essential fats that play a critical role in managing inflammatory skin conditions and supporting long-term skin health in dogs with allergic dermatitis.

Brewers yeast – A natural source of B-group vitamins and nutrients that help nourish the skin, promote coat strength and support healthy cell regeneration.

Methylsulfonylmethane (MSM) – A naturally occurring sulphur compound known for its anti-inflammatory benefits, helping to ease itching, discomfort and skin sensitivity.

Inulin (prebiotic fibre) – Supports gut health, which is closely linked to immune balance and may help reduce the frequency and severity of allergic reactions.

Manuka honey – Valued for its soothing and antimicrobial properties, helping to calm irritated skin and support the skin’s natural healing process.

Vitamin E – A powerful antioxidant that helps protect skin cells from oxidative damage while supporting skin repair and hydration.

Zinc – An essential mineral that plays a key role in maintaining healthy skin, supporting wound healing and strengthening immune function.

Turmeric – Contains curcumin, a natural compound known for its strong anti-inflammatory and antioxidant properties, helping to support joint, skin and immune health.

Selenium – Supports immune system function and helps protect cells from oxidative stress, which can worsen inflammatory skin conditions.

Biotin – A vital B-vitamin that promotes healthy skin, strong hair growth and a shinier, more resilient coat.

Supporting Dogs with Allergic Dermatitis from the Inside Out

Skin & Coat Supplement for Dogs & Cats

Dogs with allergic dermatitis often have a weakened skin barrier, making them more reactive to allergens. Supplementing with omega-3 fatty acids, antioxidants and skin-supporting nutrients can help strengthen the skin and reduce flare-ups over time.

This is especially helpful for dogs with recurring itching, dry skin or seasonal allergies.

Special Offer: Bundle and Save 25% - Allergy Care Duo for Dogs & Cats Bundle Pack

Additional Tips for Managing Allergic Dermatitis in Dogs

Maintain regular flea prevention

Bathe with gentle, soothing shampoos to remove allergens

Wash bedding frequently

Identify and avoid known triggers where possible

Follow a consistent skin-support routine, not just flare-up treatment

Final Thoughts: Managing Allergic Dermatitis in Dogs

Allergic dermatitis in dogs can be frustrating, but with the right combination of veterinary care, dog antihistamine use when appropriate, and ongoing skin support, most dogs can live comfortably and itch-free.

By supporting your dog’s skin health from the inside and managing allergic triggers early, you can reduce flare-ups and help your dog enjoy a happier, healthier life.