Chronic pain is longstanding pain that persists beyond the usual recovery period or occurs along with a chronic health condition. Because this pain is not protective and is not a result of an ongoing injury, it is referred to as “pathological” and is therefore treated as a condition, not as a symptom. Chronic pain may affect people to the point that they cannot work, eat properly, participate in physical activity or enjoy life. Pain is the body’s mechanism of self-preservation. It acts as a warning to indicate that harm or damage is happening, or is about to happen, to tissues in our bodies. Pain may be defined as an unpleasant sensory and emotional experience associated with actual or potential tissue damage.