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Dr. Andy
Dr. Andy, Medical Director
Category: Dog Veterinary
Satisfied Customers: 29984
Experience:  UC Davis graduate, emphasis in dermatology, internal medicine, pain management
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Red rash on dog's belly and private area

Resolved Question:

My dog has a red rash on his belly and his private area and tail is red licks and is itchy. what do I do?

Submitted: 7 years ago.
Category: Dog Veterinary
Expert:  Dr. Andy replied 7 years ago.

Hello,

What is your pet's age and breed?

Does he lick or chew his feet?

When did this rash start?

Any current or recent issues with fleas?

Thanks

Dr. Andy

Customer: replied 7 years ago.
He is about 3 years old. The breed is a pit bull and sharpae mix. No, he doesn't lick or chew his feet. I haven't seen too many fleas just one every once in a while. He started about a month ago, thought it was hot spots. I bought "Natural Care" Hot spot itch relief but it hasn't been helping.
Expert:  Dr. Andy replied 7 years ago.

Okay.
The fleas, even one, must be addressed immediately. Stay away from Hartz or Sargeant's products. I prefer advantage, frontline, promeris, for topical flea control products.

Now, it sounds like we are dealing with a primary allergy problem.
This could be food or environmental allergies.

So, to rule-out food allergies you need to do a diet trial.
Summary: The primary protein in most dog foods is lamb, chicken, or beef. The primary carbohydrate is rice or corn. So, we need to change both. The most popular alternative diets are Venison and Potato, Duck and Potato, or Fish and Potato. It is available in prescription formulas (i.e. Science Diet D/D) or you can find some similar foods at the big pet stores like PetSmart or PetCo. Keep in mind, holistic or all-natural foods are not necessarily any better when trying to remove a food allergy. Chicken is chicken, and rice is rice. When you perform a diet trial, you must stick with the food for 2-3 months to see if there is any benefit. No other treats or human food can be given during this time period.
http://www.petplace.com/dogs/food-allergy-in-dogs/page1.aspx

Also, definitely read about ENVIRONMENTAL ALLERGIES (atopy). Some pets, suffer from both environmental and food allergies:
http://www.petplace.com/dogs/atopy-in-dogs/page1.aspx

If you want to actual diagnose what in the environment may be causing the allergy, you can do an allergy test. Now, you don’t have to shave half the body and do the old grid test on the skin. There is now a rather good blood test that looks for allergies to weeds, trees, grasses!, molds, even house dust mites. You can read more about it here:
http://www.varlallergy.com/index.html

Now, in addition to allergies, there are also some other common causes of skin problems or secondary infections that can occur:
Mites (demodex or scabies). Demodex is not contagious, however, scapies or sarcoptic mange is zoonotic. So, keep in mind, when ever someone mentions mange, it is important to distinguish between which mite. To diagnose if there are mites, your veterinarian can perform an easy skin scraping test in the hospital. It is not always 100% accurate, but a good start. It can be difficult sometimes to scrape out the mites.
Demodex: http://www.petplace.com/dogs/demodicosis-red-mange-in-dogs/page1.aspx
Scabies: http://www.petplace.com/dogs/sarcoptic-mange-in-dogs/page1.aspx
Skin scraping: http://www.petplace.com/dogs/skin-scraping/page1.aspx

Secondary yeast or bacterial infections (very common)
Frequently, the skin will be inflamed, have an odor, and/or oily component.
http://www.petplace.com/dogs/skin-discharge-or-odor-in-dogs/page1.aspx

TREATMENT OPTIONS (A small representative list)
Steroids. Veterinarians will either give an injection that can last from hours to weeks, or send home oral steroids like prednisone or dexamethasone.
Antihistamines. A prescription of hydroxyzine is common. Sometimes, over-the-counter Benadryl will help.

Benadryl can be given at a dose of 1mg per pound of body weight. Keep in mind, Benadryl tablets and liquids come in different sizes. So, an approximately 25 pound dog can get a full 25mg tablet or a half of a 50mg tablet. I usually avoid the liquid Benadryl in larger dogs (you would have to give too much of it). You can give Benadryl every 8-12 hours.
http://www.petplace.com/drug-library/diphenhydramine-benadryl/page1.aspx

Essential fatty acid supplements. Definitely, if you plan to give an antihistamine long-term,
combine it with an EFA supplement. I prefer the veterinary products dosed for pets. Your vet
should carry a product on their shelf, or over-the-internet you can look for Aller G3, 3V caps,
EFA-z, or Derm caps.
Some vets use a product called Temaril-P. It’s an antihistamine with a low-dose steroid built into
the same tablet.
Atopica. Neat stuff. Can take a few weeks to be of benefit. Not the most cost-effective, but can
be incredible for allergies when the above does not work. Read the link below for more
information.
http://www.us.atopica.com/indexConsumer.shtml
Your vet may also carry some special sprays or shampoos for the skin. Some contain topical
steroids with antibiotics. Others contain analgesics to comfort the skin like “Relief Shampoo” and
“Relief Spray”
Lastly, oral antibiotics or antiyeast medication, if indicated.

Hope all that helps
Good Luck

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