Get Your Dog Care Questions Answered by Experts
Hello, I'm Dr Gary. I've been practicing veterinary medicine since 2007. I look forward to helping with your questions/ concerns.
It sounds like you're most likely dealing with allergies. It could be a flea allergy dermatitis, but I would guess it's more likely environmental allergies.
To diagnose allergies, you need to get allergy testing done. This is done by injecting small amounts of allergens under the skin in a grid fashion. We then monitor the spots to see which ones she reacts to. Most allergy dogs will have many different pollens, trees and indoor allergens that they react to.
The treatment is then with Immunotherapy. This is by slowly de-sensitizing them to the allergens.
Here is a nice write up on how the testing and treatment works:
In the mean time, you can try some Benadryl to help with the itching. The dose in dogs is 1-2 mg per lb body weight. It can be given every 6-8 hours, as needed.
I hope this helps, let me know if you have any other questions.