Catherine Zeta Jones treated for bipolar

Walking the red carpet at the Museum of New York contemporary art this week, Michael Douglas felt grateful for all the wishes he has received from friends and fans as he battled cancer.

"I feel great!" Actor, 66, told people at an event Tuesday night to celebrate the 120 anniversary of Carnegie Hall. "I feel tremendous support from many people."

There is no event has been his biggest supporter: his wife Catherine Zeta-Jones. Several hours later, it became clear that she quietly seek healing yourself. Her representative says the actress recently joined a site within a few days to treat her bipolar disorder II.

Revelation was surpsing for many, not least because the Oscar actress and mother-of-two has remained consistently positive in keeping with the public side Douglas through a grueling six-month battle with cancer.

But behind the scenes near the actress said that she felt the tension. Its representative acknowledged timing Zeta-Jones, 41, seeking treatment was partly due to "stress the past year."

Adds another, "Catherine had to deal with the illness of Michael, and it was hard."

Breakinh News About Bipolar isorder

Mental health professionals have identified four main subtypes of bipolar disorder, which together are referred to as bipolar spectrum disorders: bipolar I, II bipolar, bipolar not otherwise specified, and cyclothymia.

Although the symptoms differ from person to person factors that distinguish bipolar types include the duration and intensity of mood swings.

Depression is the main characteristic of bipolar II. While those with bipolar II is "up" periods, these episodes are less pronounced. Instead of a full-blown mania, people with bipolar II experience hypomania, a milder form of mania. Studies show that women are more likely to have bipolar II.

Although people with bipolar II may deny that anything is wrong, loved ones, will probably notice that he or she seems agitated, it flies off the handle more often, or seems unusually upbeat.

Bipolar II is sometimes mistaken for depression, because hypomanic periods more difficult to detect. Over time, if left untreated, hypomania - "before" period - may progress to mania or become depressed