Psoriasis is a common skin disease characterized by thickened patches of inflamed, red skin covered with thick, silvery scales. The elbows and knees are the most common areas affected by psoriasis. It will often appear in the same place on both sides of the body. The patches can range in size from smaller than a dime to larger than a hand.
Description of Psoriasis -
Normally, skin cells mature and shed after about a month. In psoriasis, the cell maturation speeds up, taking only three to four days. Because the lower layer of skin cells divide more rapidly than normal, dead cells accumulate in thicker patches on the skin's outermost layer called the 'Epidermis'.