Could this rash be inverse psoriasis? (Photos)

I have these red patches on the back of my neck. They started probably two years ago, as very small red spots. Now they've taken over the back of my neck. I'm wondering if it might be inverse psoriasis. It doesn't hurt and isn't tender to the touch. It itches a bit from time to time, and on rare occasion it flakes a tiny bit. It feels smooth to the touch, as it it were covered in baby powder. Those patches of skin also arent making any oils. I do die my hair, but I don't think that's the issue.

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