Matthew Perry explains that he has spent the last several months in the hospital following surgery to repair a gastrointestinal perforation. On Friday, the 49-year-old Friends alum tweeted: “Three months in a hospital bed. Check.” A gastrointestinal perforation “occurs when a hole forms all the way through the stomach, large bowel, or small intestine. It can be due to a number of different diseases, including appendicitis and diverticulitis. It can also be the result of trauma, such as a knife wound or gunshot wound,” according to Healthline, via People.