Bipolar I
This is when the person has either alternating episodes of depression and mania, or mixed episodes (depression and mania at the same time), or pure manic episodes (without depression). In all cases the symptoms are very much out of character with the person’s normal conduct. The person may react so severely that it requires immediate hospitalisation and professional care.
Bipolar II
This is a pattern of depression interspersed with hypomania episodes. Usually the depression lasts longer than the hypomania. Though it is (clinically) less severe than bipolar I, it still requires treatment, as the severity and the person’s reaction is unpredictable – it can change or escalate very quickly.
Rapid-cycling Bipolar Disorder
People with this disorder have four or more episodes of bipolar I or II in one year. The cycles can come and go in a matter of days or hours. Bipolar II sufferers are more inclined to rapid-cycling. This is a very serious form of bipolar disorder and always requires urgent professional intervention.
Mixed-state bipolar
This is when people experience the states of depression and mania, both at the same time. Scientific tests have shown that we can have both episodes simultaneously, much like the common “laughing through the tears” phenomenon. When this happens, a bipolar person will be in a state of confusion and too unstable to carry out a task properly. One part of them wants to do it, while another part rejects it. It is not an exclusive phenomenon, as it can affect any bipolar I or II sufferer at any time. It causes extremely rapid and volatile shifts in emotions.
Cyclothymic Disorder (Cyclothymia)
Cyclothymic disorder is a relatively mild disorder, diagnosed when someone has mood swings that cycle between mild depression and hypomania, with periods of normality in between. Although milder than bipolar I and II, it might interfere with work and relationship functions. It increases the risk of developing severe bipolar disorder.