Loneliness is not just an emotion. It physically rewires your brain. Even two weeks of social isolation can cause measurable changes in brain structure and function. PMID: 36434053 Loneliness shrinks the amygdala, the hub for emotions, and disrupts the dopamine reward system, leaving you less motivated and less able to feel pleasure. It reduces prefrontal cortex volume, impairing decision-making and social behavior. The hippocampus, crucial for memory, shrinks. Levels of brain-derived neurotroph