Hypochondria (illness anxiety disorder) involves persistent preoccupation with having or developing serious illness, despite medical reassurance, rooted in anxious threat detection (hyperactive amygdala scanning for danger), heightened interoceptive awareness (excessive focus on body sensations), and cognitive biases interpreting benign symptoms as serious disease. The "organism as team" perspective is helpful: your protection team is extremely dedicated to keeping you safe from illness, but it's become overvigilant. Your body-monitoring team (interoceptive awareness) scans constantly for concerning sensations—detecting normal variations (heartbeat changes, digestive gurgles, muscle twitches) that others ignore. Your threat evaluation team then catastrophizes these sensations, interpreting them as disease evidence. Your attention team selectively focuses on health information, finding confirmation of feared illnesses. Your reassurance-seeking team drives medical visits, but paradoxically, reassurance only briefly calms anxiety before doubt returns ("What if they missed something?"). This creates exhausting cycles of monitoring-anxiety-checking-brief relief-renewed worry. Your anxiety team is trying to protect you but is stuck in false alarm mode. Treatment involves retraining these teams: exposure with response prevention teaches your system to tolerate health uncertainty without checking, cognitive therapy updates catastrophic interpretations, mindfulness reduces hypervigilant body monitoring, and anxiety management helps your regulation team. Your brain can learn to distinguish actual health threats from anxiety-driven false alarms. ⚕️ This protocol does not replace professional consultation.