The skin condition psoriasis is still not fully understood. What we do know is that it is directly related to the immune system and how that influences the production of skin cells on the body. There is a T cell, which when it works properly, helps to fight off bacteria and viruses. Those who suffer from psoriasis have T cells that attack healthy skin cells, which causes the skin to show effects of the dilation of blood vessels that cause plaque on the skin. This is essentially what causes the skin to look how it does. When new skin cells transfer to the outermost layer of the skin too rapidly, dead skin and white blood cells gather and cause the skin breakouts.
