Final answer:
Psoriasis is a non-contagious skin disease characterized by red patches covered with silver-white scales found on the scalp and other areas of the body. It results from an interplay between various cells in the skin.
Step-by-step explanation:
Psoriasis is a non-contagious skin disease characterized by red patches covered with silver-white scales found on the scalp. It commonly affects elbows, knees, back, face, palms, and feet as well.
Psoriasis results from the complex interplay between keratinocytes, dendritic cells, and T cells, and the cytokines produced by these various cells.
Learn more about psoriasis