Philippine President Rodrigo Duterte, who has a habit of chewing gum in public, even while meeting world leaders, has revealed he did it to ease pain from a spinal condition. In the past, Duterte’s admission that he used a powerful painkiller prompted concern about his health, with lawmakers urging him to undergo a medical examination and disclose the results. Known for his busy schedule and lengthy speeches, often several times a day, the 72-year-old Duterte’s low profile has fueled rumors he is in declining health and that the government is trying to keep that under wraps.