Most people have experienced it: when you're moving, engaged, and focused, pain fades into the background, then flares when you're immobilized with nothing to do. That isn't imagination; it's biology. A comprehensive review published in Frontiers in Animal Science shows that barren captive housing removes exactly those pain-dampening inputs—movement, exploration, social contact—while triggering stress-driven mechanisms that amplify pain. Drawing on decades of evidence from neuroscience, immunology, veterinary medicine, and animal welfare science, the study reveals that an animal's environment doesn't just provide the backdrop to pain; it actively shapes how pain is processed, amplified, or suppressed at the biological level.
