As an acne treatment, resorcinol has a keratolytic effect,
causing dead cells to slough off.
The top layer of skin is removed, and pores unclogged.
It is often used with sulfur, to prevent the whiteheads and
blackheads that sufur causes as a side-effect when used to
treat inflamed pimples.
Like salicylic acid, it is also used
to treat warts, psoriasis, and other skin conditions.