Hyperalgesia is a condition characterized by an increased sensitivity to pain, causing individuals to experience heightened pain in response to normally painful stimuli. This phenomenon can occur as a result of various factors, including nerve damage, inflammation, or certain medical conditions. Hyperalgesia can be either primary, which is an exaggerated response in a specific area of the body, or secondary, which is a widespread increase in pain sensitivity throughout the body. Researchers study hyperalgesia to better understand the underlying mechanisms of pain perception and to develop more effective treatments for chronic pain conditions.