We should not be depressed that the most advanced modern techniques fail to show a single simple focus of brain activity associated with pain. Touch has been used in medicine since the early days of medical care. Healing by touch is based on the idea that illness or injury in one area of the body can affect all parts of the body. If, with manual manipulation, the other parts can be brought back to optimum health, the body can fully focus on healing at the site of injury or illness. Injuries and diseases can cause changes to your body that leave you more sensitive to pain. These changes can stay in place even after you’ve healed from the original injury or disease. Something like a sprain, a broken bone or a brief infection can leave you with chronic pain. Sometimes normal pain still requires a visit to the doctor or even the emergency room.