Chronic feelings of loneliness take a toll on blood pressure over time, causing a marked increase after four years, as per a newly released study at the University of Chicago. A newly released study shows, for the first time, a direct relation between loneliness and larger increases in blood pressure four years latera link that is independent of age and other factors that could cause blood pressure to rise, including body-mass index, smoking, alcohol use and demographic differences such as race and income........