Article continues below advertisementSean SwayzeSource: @faceeverythingnrise74/InstagramSean Swayze's cousin confirmed his death on Instagram.Patrick Swayze's younger brother Sean Swayze died of an upper gastrointestinal bleed on December 15, multiple news outlets confirmed on January 7.According to his death certificate, viewed by People, Sean's health issue was caused by "severe metabolic acidosis, esophageal varices, and alcoholic liver cirrhosis.""Sean was the youngest boy, and second youngest child in the Swayze family," Patrick and Sean's brother Don Swayze said in a statement.