Red patch on scalp. Folliculitis isn't going away

Been on antibiotics for months first two months worked (lymecycline) I'd only get maybe one pustule/pimple after a hair cut now for a couple of so weeks now my scalp has been inflamed and my chest. Got my hair cut today for first time in a month or so and it was painful and saw this red patch. My scalp also gets very itchy. Whenever my scalp or elsewhere on my body has been cultured on the two occasions they've done it first time they found nothing second time staph. The itching gets very bad when I sweat. I first actually felt the inflammation back on my scalp when I used Nizarol for the first time in weeks like two weeks ago . But seems it might just have been a coincidence.

I don't really know what to do I will go back to my derm. I don't want to go on accutane and dont actually get how that would help especially if it's bacterial.