People who undergo weight loss surgery may be at risk of addictive behaviors such as drug or alcohol abuse and cigarette smoking. “Many of these people have struggled with obesity their entire lives, and in a very short period of time, they literally develop these new bodies,” Conason says. “Patients will walk by a mirror and say they don’t recognize themselves. Their weight loss changes how family and friends relate to them. They’re getting different kinds of attention, and it’s a lot to adjust to. For many patients, bariatric surgery often lifts their depression, but other patients may struggle with their new bodies.