More information will be needed.
What breed of dog?
How old is the dog?
Up to date on needles, deworming?
Any medical conditions?
What type of food is fed?
Where is the itchness at?
Any sores etc?
What shampoo do you use?
Flea treatment?

The more information you can give the experts the better advice they can give you.

Could be allergies, my best bet would be from commercial dog food, you can provide temp relief with Benadryl, and you can provide permamnt relief by playing the trial and error game with holistic brands of food.

If you answer the above questions, we can provide you with more info on tips on how to treat.

I had a skin issue with one of my dogs and the itch drove him crazy also I found giving him extra oils like the omega 6-4-9 or even vitamin E capsules a couple a day made a difference I also opened a vitamin E capsule and put the oil directly onto the skin, luckily he only had approx an eight inch round area on his back that was causing the issues but the oil made a huge difference, if the itch is due to fleas you can use garlic oil this gives the extra oil to the skin and the garlic helps to ward off the fleas naturally. If it is a whole body itch benadryl could give some relief until a vet can see what the source of the problem is, there are medical issues that can cause itch so if in doubt take him to the vet

Vitamin E and the Omega's would be an excellent idea. I usually always suggest it, so I can't believe I didn't mention that :o

You can add a can of sardines or cod liver oil capsules as well. The deeper sea fish are the ones packed with all those great fatty oils. I have never heard of garlic oil for fleas, I'll have to look it up, but I have heard that adding a teaspoon (depending on size of dog) of apple cider vinegar to their meal will naturally repel fleas and ticks and chiggers. It's also a great way to help combat allergies. I've also read that it has been used in canine and feline arthritis management.

Here's an interesting "blurb" I found:


Fleas, flies, ticks and bacteria, external parasites, ring worm, fungus, staphylococcus, streptococcus, pneumococcus, mange, etc. are unlikely to inhabit a dog whose system is acidic inside and out. Should you ever experience any of these with your dog, bathe with a nice gentle herbal shampoo -- one that you would use on your own hair -- rinse thoroughly, and then sponge on ACV diluted with equal amounts of warm water.

Apple Cider Vinegar for Dogs (http://www.earthclinic.com/Pets/acvfordogs.html)

Apple Cider Vinegar for Dogs | Benefits of ACV (http://www.natural-dog-health-remedies.com/apple-cider-vinegar-for-dogs.html)

Duke, my peke, has sever allergies. I swear he is allergic to himself! The best thing we did for him was switch him to Evo (which is now mixed in the another food though), feed him coconut oil on top of his food, and when allergy season gets REALLY bad, we give him benadryl as well as oatmeal baths.

I recommend brushing twice a day as well, it really helped Duke! Best of luck!

My dog had a problem with itching. She's a GSD and nothing worked - medication, diet, salves, anything else. We took her for a second opiniion, that Vet did a (very expensive) full blood panel and discovered she has a very slow thyroid. She's on medication and the itching has stopped.