Dermatological science refers to a field that includes the study, research, diagnosis and treatment of any medical disease impacting the nails, skin, membranes and hair. Eczema, cold sores, acne, fungal infections, skin cancer, psoriasis, dermatitis and warts are some of the most common dermatologic conditions. There are various forms of dermatological therapies that can be used for the management of skin diseases, such as surgery, topical drugs, radiotherapy, photodynamic therapy, laser therapy, dermatohistopathology, immunotherapy and phototherapy. The most recent developments in medical and cosmetic dermatology comprises scientific discoveries for oral sun protection, breakthroughs in botanical blends for hair care, and new directions in red light photodynamic therapy (PDT). It also involves the development of new devices to treat superficial skin lesions and solar lentigines for improving aesthetics. This book is a valuable compilation of topics, ranging from the basic to the most complex advancements in the field of dermatology. It covers in detail some existent and innovative concepts revolving around this domain. This book will serve as a reference to a broad spectrum of readers.