We are all familiar with pain. Most of us have encountered some sort of injury or illness and the uncomfortable physical sensations that arise from this. The purpose of pain and how it works as a function are however less widely understood. Acute pain is physical sensation that is tied to tissue damage – say some sort of injury or maybe an infection. Chronic pain is something that lasts longer than three months and cannot always be attributed to tissue damage or known illness. People’s individual experiences of pain vary greatly. The severity of injury does not automatically correlate with…