Psoriasis is an inflammatory condition affecting millions of Americans. The symptoms of psoriasis can overlap with other skin disorders such as eczema, and skin types, like dry skin. However, psoriasis isn’t just a skin condition—it’s an autoimmune disease. The most common type of psoriasis is plaque psoriasis, which is characterized by a buildup of skin cells that form plaques, or thick, scaly areas on the skin.