The move now means one in three Americans has a health condition.
AMA board members say recognizing obesity as a disease will change the way the medical community tackles the complex issue. They hope it also helps doctors jump the hurdle in discussing weight issues with their patients.
More than half of obese patients have never been told to lose weight by their doctor.
With so many Americans dealing with obesity, some are fighting back with a new tool -- social media.
It's part of a daily routine for millions of people, who check it on their phones, computers and tablets.