What is hyperalgesia?
Hyperalgesia is increased pain from a stimulus that is normally painful.30
Primary hyperalgesia occurs in injured tissue (for example, tenderness after a cut), whereas secondary hyperalgesia is seen in adjacent undamaged tissue due to sensitization within the CNS and can be assessed with a sharp object.31
What causes hyperalgesia?
Current evidence suggests that hyperalgesia is a consequence of damage to the nociceptive system. 30
What is hypoalgesia?
Hypoalgesia is defined as a diminished sensation of pain in response to normally painful stimuli.32
