What is the best cure for dog dry / itchy skin?

lupus itchy rash: question : What is the best cure for dog dry / itchy skin I have a mixture of lab 3 years old and has extremely dry skin and itching. She scratches constantly and flea medicine I think he could have fleas, but they still always zero. Recently, I noticed large flakes on her fur. It may be allergies, but I think it's just dry skin. Does anyone have any suggestions for some home remedies I can try to solve the problem? Poor baby, she is miserable. If I can not help soon,

Itching Urticarial Rash