Psoriasis is a chronic, recurring autoimmune condition affecting the skin. The condition causes rapid growth of skin cells resulting in thick, dry, discolored patches of skin. Plaque psoriasis is the most common form of the condition. Plaques commonly form over knees and elbows, but can affect any area of the body. Severity varies from person to person and can improve or worsen over time. For some it is just an annoyance, and for others it can be painful, embarrassing and debilitating. There are over 7 million people living with psoriasis. While there is no cure, there are several medications meant to slow down the production of skin cells and reduce inflammation.