Catherine Zeta-Jones is seeking treatment for bipolar disorder."Catherine has proactively checked into a health care facility," her rep reveals. "Previously Catherine has said that she is committed to periodic care in order to manage her health in an optimum manner."This is the second time the brunette beauty has sought help. In 2011, the Side Effects star completed a 5-day stay at a mental-health facility in Connecticut for the same issue.At the time, her publicist stated, “After dealing with the stress of the past year, Catherine made the decision to check in to a mental health facility for a brief stay to treat her Bipolar II Disorder.”2010 proved to be very trying for Catherine. Husband Michael Douglas underwent chemotherapy for stage 4 throat cancer in 2010. He later went into remission. That same year, Douglas’ son Cameron, from a previous relationship, was sentenced to prison on drug-related charges.But Catherine has been very open about her struggles."If my revelation of having bipolar II has encouraged one person to seek help, then it is worth it," the 43-year-old has said. "There is no need to suffer silently and there is no shame in seeking help."In November, Catherine discussed her disorder with InStyle."I'm not the kind of person who likes to shout out my personal issues from the rooftops," says the Traffic star, who has son Dylan, 12, and daughter Carys, 10, with Michael. "But with my bipolar becoming public, I hope fellow sufferers will know it's completely controllable. I hope I can help remove any stigma attached to it."