Plaque Psoriasis (Psoriasis Vulgaris) is the most common type of psoriasis, demonstrated in about 80% of psoriasis sufferers. Psoriasis vulgaris appears as dry, slightly raised, red patches, known as plaques, covered with a layer of silvery white scale. They may to start as small bumps that grow together and are typically found on the elbows, knees, scalp, and lower back.
If you have plaque psoriasis, you may also experience changes to your toenails and fingernails-in fact, this occurs in about half of people with psoriasis. Changes to be aware of include: pitting, thickening, discoloration, and loosening of the nail from the nail bed.