This book is targeted for medical and other health care professionals (Students and in practice) like Physical Therapist, Occupational Therapists, Chiropractors, Athletic Trainers, etc who deal with superficial and deep heating modalities on a daily basis. This book gives outline about skin anatomy, physiology, pathophysiology and modalities used and its effect at cellular level. How utilization of heat can assist in rehabilitation of a patient and what precautions needs to be exercised. This book also features a chapter by Dr. Jerrold Petrofsky a Nobel Prize nominated professor discussing how age, ethnicity, race and other factors interacts with each other while dealing with heat.