What will treat chronic folliculitis and post-inflammatory hyperpigmentation on my thighs and buttocks? (Photos)

I’m 23 years old with dry, sensitive skin. The folliculitis mainly affects my thighs, buttocks, and occasionally my legs. The bumps can be itchy and leave behind dark marks. My skin tends to get more irritated with friction or heat. I’ve used over-the-counter washes, retinoids, and gentle moisturizers, but haven’t found a lasting solution. I’d like to understand if oral medications, laser hair removal, chemical peels, or other dermatologic procedures could help clear the bumps and improve the discoloration long-term.