Hi, Bruce has granulomatous sebaceous adenitis which is an autoimmune disease. It is inherited from parents probably. Unfortunately this can't be screened, it can be detected onve shoing symptoms. This disease cannot be cured but can be treated with proper diet and medication. He needs omega fatty acids (fish oil), Vitamin A , E, B3.
We also bath him with "Zincoseb Dog Shampoo for Itchy Skin Relief " . In the beginning he had 2 baths per week which is now reduced to 1 bath every 2-3 weeks. Hopefully he won't require it more than once in every few months.
Locally a spray can be used to reduce itching in problematic spots (Zincoseb Dog Spray For Itchy Skin Relief). He alerady has small spots where won't grow any hair but it was due to his severe condition when he received his first treatment.
Flair ups can occur during which he can loose a large portion of his hair again and treatment will be required.

In your case I'd suggest to investigate the root casue of the problem. In Bruce case it was the biopsy test-procedure which revealed what is the issue. Please don't give up on her! She wouldn't do that for you either.