Bipolar mania, hypomania, and depression are symptoms of bipolar disorder. The dramatic mood swings of bipolar disorder do not follow a set pattern. Depression does not always follow mania. A person may experience the same mood state several times -- for weeks, months, even years at a time -- before suddenly having the opposite mood. Also, the severity of mood phases can differ from person to person.

Hypomania is a less severe form of mania. Hypomania is a mood that many don't perceive as a problem. It actually may feel pretty good. You have a greater sense of well-being and productivity. However, for someone with bipolar disorder, hypomania can evolve into mania -- or can switch into serious depression.