Home > Medical > Stress > Stress News How a happy relationship can help your health Imaging studies show that viewing pictures of one's romantic partner activates brain regions related to mood and pain regulation. WATCH | Avoiding burnout: Rediscovering the art of doing nothing Unplugging is essential. New clues show how stress may turn your hair grey Scientists found that stress activates nerves that are part of the fight-or-flight response, resulting in permanent damage to pigment-regenerating stem cells in hair follicles.