Well I did some research for you..I foudn this site, which willhelp you read and learna bout the differant types and causes of itching in your pet
Itch and Scratch: Common Skin Problems in Dogs at ThePetCenter.com
Now to help sooth the itching, I found the following, and use some of these myself for my pets
** Dab with milk of magnesia to calm irritated skin.
** Aloe vera from plants and creams. Apply gel directly on the spot. Or dilute with water, put it in a spray bottle and spray it on the spot
** Apply a mixture of baking soda and water to the affected areas. This also helps soothe itchy human skin in case you, too, have a sting, rash or poison ivy.
Seasonal dermatitis or summer eczema: For this condition involving itchy skin and red eruptions with secondary bacterial infections as a result of allergies to flowers, grass and tree pollen, Dr. Michael Fox recommends antihistamine medication (and steroids, in severe cases). Anti-flea medicines can worsen pollen-allergy problems by disrupting a dog's immune system. Writes Dr. Fox: "Pollen-allergy eczema can be misdiagnosed as mange, which is caused by skin-burrowing mites, which a routine skin-scraping might or might not reveal. A careful diagnosis is important -- not more flea-killing poisons! Many dogs respond well when their diets are supplemented with honey, preferably locally made, and bee pollen, which is available in health food stores and farmers markets. Use a dosage of 1 teaspoon per 30 pounds of body weight daily in the dog's food."
* To prevent and to treat these and other skin conditions, it is important to build up the affected dog's immune system through healthful high-quality food and supplements such as flaxseed oil. Oatmeal baths help soothe the skin and relieve itching.
You can also try to relieve your pet's itch with calomine lotion or an over the counter spray or lotion corticosteroid I do that with severe itching problems
Sometimes adding vitamins such as vitamin C, Vitamin E, selenium and zinc will help (ask your veterinarian for the correct dose for your dog) or adding one teaspoon of safflower oil to your dog's food daily.