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my face is dry and itches?

i just started using acnefree face wash and spot treatment.
and each product has 2% benzoyl peroxide.
and when i use the face wash and after i put on the spot treatment, it dries my face out very much.
it doesn't have redness, only a burning sensation when i put it on.
then later, after i've used it for a couple days, my face is begining to itch. not in the areas where i use the benzoyl peroxide though, like on my neck.
i do have very sensative skin also.

it works well, but the itch is somewhat an annoyance.
should i continue to use these products?
any recommendations for other good working acne treatments that wont do this to my face?