"It will be very difficult for a person like that to be honest and forthright about their condition," Robbins said. "People tend to see someone with these conditions as weak rather than realize that to deal with this and carry on requires a great deal of courage."
Jackson has been absent from Congress since June 8, and his absence went unexplained until June 25, when his office said he was suffering from exhaustion.
"That's what he has. He doesn't get a lot of sleep and he has sleep disorders. He's very energetic, running full-steam ahead, working six or seven days a week often and he's been doing that for a long time," a source close to Jackson told ABC earlier this week. "There's a great deal of pressure on him due to unfounded allegations [related to the ethics inquiry] and negative press onslaught against him that are not true, so it kind of all caught up to him. He needed downtime to get away from grind."
Jackson's office told ABC News today that the congressman has been in the treatment facility for a few weeks, but would not speculate on how long he will be there. Koenig said treatment typically lasts up to 10 weeks, at most.
Jackson is likely receiving a combination of psychotherapy and drugs for his condition, doctors say. And although treatment at a residential facility sounds fairly extreme, getting treatment is a very positive step.
"It often sounds like it's punitive, but it's not," Auerbach said. "It's an opportunity for people and treatment teams to put a plan in place that will optimize their success in the future."
There is no reason to suspect that Jackson will not be able to resume his duties when his treatment has concluded, doctors say.
ABC News' John Parkinson contributed to this report.