What are symptoms of bi polar disorder?

Mania and depression: At least one episode of mania, hypomania, or a mixture of manic and depressive symptoms is required for diagnosis. Depression is usually more frequent, but not required. Mania is characterized by increased esteem, impulsivity and decreased need for sleep. Depression is decreased self esteem, energy, motivation and interest in pleasurable activities. See mine and others responses to similar questio.

Bipolar: Manic depression is a mood disorder that presents with extreme highs & lows, with at least few weeks of manic phases (abnormally elevated mood & energy level) alternating with few or more weeks of depressed phases (sad, guilty, hopeless/helpless, changes in sleep/appetite/energy level). Any phase can be severe enough to experience delusions or hallucinations.

Bipolar: Bipolar I and bipolar II, In the first, manic phases are more severe, and in the second, depressive phases are more severe. There is also cyclothymia which is a low grade version of bipolar disorder in general, where mood swings are not as severe in either direction, manic or depressive.