Psoriasis is a condition which is caused by an immune reaction to the skin. It is characterised by red and itchy skin patches. This book on psoriasis discusses topics relevant to its cause and spread. Psoriasis disease affects many people at different levels and its treatment and diagnosis vary with the extent of the disease. This book aims to shed light on some of the unexplored aspects of psoriasis and the recent researches in this field. Those in search of information to further their knowledge will be greatly assisted by this text. It will be helpful to students, experts and professionals in the field of dermatology and medical genetics.