Causes of Itchy Skin in Dogs

Itchy skin is one of the most common problems affecting dogs. Despite being covered in fur, a dog's skin is very sensitive. Symptoms of both internal and external problems often manifest in the skin. The causes of itchy skin in dogs can vary widely. The four most common causes of itchy skin are allergies, fleas, demodectic mange and sarcoptic mange.

  1. Allergies

    • Dogs can have seasonal allergies just as people do.

      The most common cause of itchy skin in dogs is allergies. Dogs may be allergic to something they inhale, such as pollen, or to specific foods or environmental toxins. As the allergic reaction increases, the itchiness will also increase. Dogs with allergies will often have open sores on their skin from excessive itching. Since allergies are the most common causes of itchy skin in dogs, the first step in alleviating the itchiness is to eliminate possible allergens through environmental changes and food trials.

    Fleas

    • Fleas and flea allergies can cause extremely itchy skin in dogs. While fleas usually cause almost every dog to scratch, dogs with flea allergies will often scratch constantly, even causing sores on the skin. For dogs who have a sensitivity to fleas, even one flea bite can cause generalized itching. Dogs with flea allergies benefit from receiving both topical and oral flea prevention. For dogs with severe allergies, owners may also consider treating indoor and outdoor environments for fleas.

    Demodectic Mange

    • Mange can make a dog particularly uncomfortable.

      Almost every dog is exposed to the mites that cause demodectic mange. Most puppies are infected with the mites from their mothers within the first week of life. Most dogs have mites their entire lives with no symptoms. Dogs with compromised immune systems may not be able to keep the mites under control, and may develop demodectic mange. Dogs with mange will lose hair and develop lesions as the disease progresses. In most cases, the lesions will itch. In cases of mange that cover the whole body, dogs will often have generalized itchiness. Demodectic mange treatment may take months to be completely effective, and should be monitored by a veterinarian.

    Sarcoptic Mange

    • Sarcoptic mange, also known as scabies, is caused by a mite. Unlike demodectic mange, which often develops in dogs with compromised immune systems, sarcoptic mange can infect healthy dogs. The most common symptoms of sarcoptic mange are severe itching and skin lesions. A variety of treatment options are available, but all treatments should be monitored by a veterinarian. In many cases, dogs with sarcoptic mange will develop secondary skin infections and require antibiotic treatment.

    Dry Skin

    • Just like humans, dogs can also develop itchy dry skin, especially in the winter. Before assuming your dog has one of the more serious causes of itchy skin, check for dandruff to see if dry skin may be the problem. In most cases, this can be alleviated by adding a tablespoon of vegetable, olive or peanut oil to the dog's food every day.