Not sure if my folliculitis is the same as yours, but years of suffering ended within 3 days of my first headshave. If I go more than a few days without shaving, it comes back.
I discussed this with my doctor, and he said we could try antibiotics long term. I didn't want to do that, so he said I could just keep shaving my head, and that it looked good on me.
Next week I have my first appointment with a dermatologist for a suspicious mole, so I will stop shaving soon so I can show her the issue.
Sound like you want to try a headshave, so you will soon see if it helps. I found shaving soap with a safety razor works best. And cold water rinse then some witch hazel works best for me.