18 Feb Acute pain starts suddenly and usually doesn't last long. When the injury heals, the pain stops. For example, a broken leg will hurt during. Chronic pain is pain that persists over time (6 months or longer) and typically results from long-standing (chronic) medical conditions or damage to the body. 18 May Pain can range from a mild discomfort to intense or throbbing pain. Pain can also be short-term, or long-term. This case study discusses a year-old opioid-tolerant patient who underwent amputation below the left knee and received pain management in the PACU. Chronic pain is pain that lasts a long time. In medicine, the distinction between acute and chronic pain is sometimes determined by an arbitrary interval of time. According to the American Academy of Pain Medicine, more than billion people around the world have chronic pain. It's the most common cause of long- term.