I am not familiar with "under the skin folliculitis
", having neither seen nor heard of it. Besides, folliculitis
doesn't itch. Moreover, the bacteria in folliculitis
are staphylococci, which generally don't respond to doxyxycline.
Some doctors treat atopic dermatitis with antibiotics, oral and topical, at least intermittently, thinking that bacteria play at least a secondary role. It's conceivable that that's why doxyxycline worked.