Itchy dog but no fleas  

she may have a skin irritation that you can't see, or it may be nerves. I had a dog that did that. maybe she's allergic to the shampoo, try a different brand before taking her to the vet. good luck.

My dog have similar case too,
but not that serious case.

Without flea in her body,
she still fell itchy and scratchers everywhere on her,
especially on the ear part and back side.

Since I didn't take my dog go out,
I believe that no problem with my dog.

You might want to take your dog to have a check.

It might be mange. Mange is a skin disease found in many dogs and is caused by a mite that burrows beneath the skin. Mange mites themselves cannot be seen with the naked eye, but the effects of their burrowing can be very dramatic. Some types of mange look like dandruff, but the effects are often short-lived. Scaly skin that usually starts on the ears but spreads to the rest of the face and body unless treated. Extremely itchy scabies is also common in dogs. This type of mange actually live in the hair follicles and are very itchy. It can spread to the entire body and be difficult to cure, but early treatment is usually successful.

Most types of mange in pets can be eradicated, especially if they are treated early. Veterinarians diagnose mange with a painless skin scraping that is subsequently analyzeed under a microscope.

Treatment may include tablets, special dips with medicated shampoos or injections. In more extreme cases, shaving may be required, or the pet may be quarantined to minimize the likelihood of transmission.

-taken from wisegeek.com

No redness at all huh? That is really interesting. It could very well be that she is having a reaction to something, or maybe having problems with dry skin. I would buy some dog shampoo for dry skin. Look for something that has oatmeal in it because oatmeal is really great for relieving itchy skin. See how she feels after that. Also, if you look at her skin and it feels dry or flaky, it can be good to add a little olive oil or an egg to her food to help from the inside too.

If you think it is just a reaction from the truck gunk, you might want to keep her awqay from the trucks for a bit to see how she does. But, since the itching has been going on for a couple months, it is probably something other than that.

If special anti-itch shampoo doesn't seem to be doing the trick, I would then go to the vet. It could be mange or some other baterial ot fungal problem.

You can also check out this webite: http://www.thepetcenter.com/gen/itch.html

That might also help give you an idea of what you are dealing with.

This is just a wild guess but maybe she has a thyroid problem. My cousin's dog does and he has almost no hair now from the condition and scratching. I know I have hypothyroidism, and when my skin gets really dry it itches alot. Animals can have the same condition as us humans. The vet should be able to tell you.

Your idea about something under the car being an irritant is very possible too I would think. I hope you can get her some relief!

It could be the shampoo. My dog scratched and had a lot of dry skin.It was noticeable because she has short black fur. I got a hypoallergenic oatmeal shampoo from the pet store.It is designed for dogs. Don't use human stuff. That can irritate their skin. That works great for her. It isn't overly expensive either. I only use the flea treatment if she has signs of fleas. That is strong stuff. I don't like over medicating.

Could be allergies. I have a 15 y/o rat terrier (fiest) that has allergies. We got her shots for awhile but they quit helping her. I give her benadryl and bathe her with an oatmeal and aloe shampoo. Some days aren't as bad as others but she still scratches and bites herself alot.

I would take her to the vet - A few dollars spent will help both the dog and you! What is she eating? Ask your vet about the raw meat diet. Cut her weight down to where it should be. (I lost my little MIKO because she was too fat and I had her on commercial dog food. Now my little chihuahua is on a raw meat diet and she is just very fine.) The flea treatment may be your problem - you may also be bathing her too often! Keep us informed.

It really does sound like allergies. Many pets are allergic to grass. As for the grime under the vehicles, I really question that one. Are you using anything on your carpets such as flea powder or scented deodorants? Those things can be irritants. Good luck!

I agree with lucy02. It really sounds like an allergy. It could very well be the grass she rolls around in. I doubt it's the stuff under your vehicles. I've never heard of any person or animal who was allergic to motor oil or grease.

You may be bathing your dog too often. A vet once told me that dogs do not need bathing on a regular basis, except when there is a health issue.

I had a dog who was allergic to fleas! I treated him regularly, as you do, but if one flea bit him, he would itch so badly!

Your best bet is to take her to the vet's to have her checked out. That way, you'll know for sure what's causing her symptoms and can get them treated properly.

Good luck with your baby!