People with scalp psoriasis often develop thick, crusted plaques or dry, cracked skin with a silvery sheen on the back of the neck ... especially in the creases of your skin.

(Photo Credit: DermPics/Science Source) Here is how it looks in the creases of your arms. Inverse psoriasis looks like bright red or pink, smooth, shiny patches on lighter skin tones.

To help you better understand what you're dealing with, we asked two doctors to explain the difference between psoriasis ... crease of joints, like behind the knees, in the bend of the neck ...