A branch of medicine which deals with the diseases of nails, hair and skin is known as dermatology. It involves the use of medications as well as surgeries. A few of the major fields of dermatology are dermatopathology, trichology and pediatric dermatology. Dermatopathology is primarily concerned with the pathology of the skin. Trichology focuses on the diseases of the hair such as hair abnormalities, scalp changes, hypertrichosis, etc. Pediatric dermatology includes the complicated diseases of infants such as hereditary skin diseases and various other problems of the neonates. Dermatology also includes various therapies such as excision and treatment of skin cancer, radiation therapy, phototherapy and laser therapy and allergy testing. This book contains some path-breaking studies in the field of dermatology. It traces the progress of this field and highlights some of its key concepts and applications. The book will provide comprehensive knowledge to the readers.