I'm not sure. Do they itch? I've had psoriasis my entire life, and when it's about to flare up on my body, it begins as a small bump that itches like crazy. After scratching it long enough (which is really hard to not do), it sort of "breaks open" or something and turns into a small dry spot a couple days later. I would put lotion on mine if I knew about them before hand, but I don't discover the bumps until they itch and by then it's too late.