Why Is My Dog Scratching So Much? Common Causes and What to Do

Is Your Dog Scratching, Licking, or Biting Their Skin?

If your dog can't seem to stop scratching, you're not alone — it's one of the most common concerns pet owners have. While occasional scratching is completely normal, excessive itching can be a sign that something needs attention. Here's a breakdown of the most common causes and what you can do about them.

1. Fleas — The Number One Culprit

Even if you can't see them, fleas are the most common cause of itching in dogs. A single flea bite can trigger intense scratching, especially in dogs with flea allergy dermatitis (FAD). Check for tiny dark specks (flea dirt) in your dog's coat, particularly around the base of the tail.

What to do: Use a vet-recommended flea treatment on your dog AND treat your home — flea eggs live in carpets and bedding. Prevention is far easier than treatment, so keep up with monthly parasite control year-round.

2. Skin Allergies

Dogs can be allergic to all sorts of things — pollen, grass, dust mites, mould, and even certain foods. Allergies typically cause itching around the paws, belly, ears, and face. You may also notice red, inflamed skin or recurring ear infections.

What to do: Keep a diary of when symptoms flare up to help identify triggers. Your vet may recommend allergy testing, a hypoallergenic diet trial, or antihistamines.

3. Dry Skin

Just like humans, dogs can suffer from dry, flaky skin — especially in winter or in dry climates. This can cause mild to moderate itching without any visible rash or redness.

What to do: Add omega-3 fatty acids to your dog's diet (fish oil is a popular option), use a moisturising dog shampoo, and avoid over-bathing, which strips natural oils from the skin.

4. Food Sensitivities

Some dogs develop sensitivities to common protein sources like chicken, beef, or dairy. Food-related itching often affects the paws, ears, and rear end, and may be accompanied by digestive issues like loose stools.

What to do: Talk to your vet about an elimination diet — this involves feeding a novel protein (one your dog hasn't eaten before) for 8–12 weeks to see if symptoms improve.

5. Mange or Mites

Mange is caused by microscopic mites that burrow into the skin. There are two main types — sarcoptic mange (highly contagious) and demodectic mange (not contagious). Both cause intense itching, hair loss, and crusty skin.

What to do: This requires a vet diagnosis and prescription treatment. Don't try to treat mange at home.

6. Yeast or Bacterial Infections

Secondary skin infections often develop when a dog scratches repeatedly, breaking the skin barrier. Yeast infections have a distinctive musty smell and cause greasy, discoloured skin. Bacterial infections may cause pustules or crusting.

What to do: Your vet will prescribe antifungal or antibiotic treatment depending on the type of infection.

7. Contact Irritants

Household cleaning products, certain fabrics, lawn chemicals, or even a new shampoo can irritate your dog's skin. If scratching started suddenly after a change in your home environment, this could be the cause.

What to do: Switch to pet-safe cleaning products and rinse your dog's paws after walks to remove any irritants they may have walked through.

When to See a Vet

If your dog's scratching is constant, causing hair loss, broken skin, or seems to be affecting their quality of life — don't wait. Early treatment prevents secondary infections and gets your dog comfortable faster.

Final Thoughts

Itchy skin is uncomfortable and frustrating for your dog (and for you!). The good news is that most causes are treatable once identified. At PawCentral, we stock a range of skin care and parasite prevention products to help keep your dog comfortable and itch-free.