NEW : Britain 's Queen Elizabeth II is now out of King Edward VII 's Hospital . Gastroenteritis is an inflammation of the lining of the stomach and intestines . It can be caused by a number of things, including food poisoning or eating too much spicy foods ( like chili peppers ) that are high in fat and/or sugar. Get the latest news from CNN.com . Elizabeth II was hospitalized `` as a precautionary measure , '' Buckingham Palace says .
NEW : Britain 's Queen Elizabeth II is now out of King Edward VII 's Hospital . Gastroenteritis is an inflammation of the lining of the stomach and intestines . It can be caused by a number of things, including food poisoning or eating too much spicy foods ( like chili peppers ) that are high in fat and/or sugar. Elizabeth II was hospitalized `` as a precautionary measure , '' Buckingham Palace says .