A psychiatric term for bipolar disorder. Often used in clinical contexts; the more common lay term is 双極性障害 (そうきょくせいしょうがい).
See also: 双極性障害
Bipolar disorder is an illness with severe mood swings.
Compound of 双極 (そうきょく, 'bipolar') and 症 (しょう, 'disorder' or 'condition'). The term is a modern medical coinage.