Why Is My Dog So Itchy?

Allergies are a very common cause of itchiness in dogs. Certain foods, plants, and environmental allergens (like pollen) can cause a dog's immune system to produce histamine, which causes the skin to itch.

Fleas and ticks

Fleas and ticks can cause intense itching in dogs. These parasites feed on a dog's blood and their bites can cause skin irritation. Fleas can be tough to get rid of and can transmit diseases like tapeworm. Ticks can also transmit diseases, including Lyme disease.

Dog mites

Dog mites are small parasites that live on a dog's fur and skin. They can cause intense itching and can also transmit diseases like mange. There are two main types of dog mites: Demodex mites and Sarcoptes mites. Demodex mites are usually found in low numbers on dogs and do not typically cause problems. However, in some dogs, they can multiply rapidly and cause a condition called demodicosis, or mange. Sarcoptes mites are not normally found on dogs and can cause a contagious form of mange.

Skin infections

Skin infections can also cause itching in dogs. These infections can be caused by bacteria, fungi, or yeast. Certain skin conditions, like eczema and dermatitis, can also cause itching.

Thyroid problems

Hypothyroidism, which is an underactive thyroid, can cause a dog's skin to become dry, flaky, and itchy.

Cancer

Some types of cancer, like lymphoma, can cause itchiness in dogs.

Contact dermatitis

This occurs when your dog’s skin comes into contact with an allergen or irritant, such as shampoo, fabric softeners, pesticides and fertilizers.

Atopy

Also called inhalant allergy, this is a common and chronic condition in which your dog’s skin reacts to allergens such as pollen, mold spores, dust mites and pet dander.

Food allergies

These can cause skin problems such as itching and dryness. Some of the most common allergens include beef, dairy products, chicken, eggs, wheat and soy.

Insect bites and stings

Bee stings and spider bites can cause itching, redness, swelling and pain. Some insects can cause an allergic reaction.

Sunburn

Can cause itching, redness and pain.