The Rochester, Minn.-based clinic specified his condition as Bipolar II, which is defined as periodic episodes of depression and hypomania, a less serious form of mania.
“Congressman Jackson is responding well to the treatment and regaining his strength,” the clinic said in a statement.
Bipolar II is a treatable condition that affects parts of the brain controlling emotion, thought and drive and is likely caused “by a complex set of genetic and environmental factors,” the clinic said. The statement also mentioned that Jackson underwent weight loss surgery in 2004 and said such a surgery can change how the body absorbs foods and medications, among other things.
The statement Monday was the most detailed to date about the congressman’s mysterious medical leave, which began June 10. But it raised new questions about when the congressman can return to work.
His father, the Rev. Jesse Jackson, wouldn’t say much about the diagnosis.
“I’m glad he’s getting the treatment he needs and is responding well,” the elder Jackson said, adding that “there’s no timetable” for his recovery.
Experts and mental health advocates say many people are able to work and function in their daily lives while managing treatment.
Treatment includes medication and psychotherapy, according to the National Institute of Mental Health. The institute estimates about 5.7 million American adults suffer from the disorder, which can be a lifelong disease.
At least one other member of Congress has suffered from it while in office.
Former U.S. Rep. Patrick Kennedy of Rhode Island has talked openly about his lifelong struggles with bipolar disorder and addiction. He’s was a leading voice in Congress for removing stigma linked with mental illness. The son of the late Massachusetts Sen. Edward Kennedy was a congressman for 16 years and retired last year.
The younger Kennedy was arrested in 2006 after an early morning car crash near the U.S. Capitol that he said he could not remember. After spending a month at Mayo for treatment of addiction and depression, Kennedy pleaded guilty to driving under the influence of prescription drugs.
“I had two of the biggest successes in politics after I went to treatment,” Kennedy said, referring to getting nearly 70 percent of the re-election vote in 2006 and his legislative victory of getting a bill requiring mental health parity passed in 2008.
“It was because I ran toward the problem and not away from it. When I returned to my district, I spoke openly about it,” he said.