Doctors warn that disrupted sleep, missed melatonin cues, and ‘social jetlag’ from night shifts or late nights quietly increase blood pressure, stiffen arteries and raise long-term heart disease risk​Doctors warn that disrupted sleep, missed melatonin cues, and ‘social jetlag’ from night shifts or late nights quietly increase blood pressure, stiffen arteries and raise long-term heart disease risk ​Latest News [ SOBAN NEWS: International and National ]