Bipolar Disorder

Bipolar disorder is an affective illness characterized by recurrent episodes of mania or hypomania and depression.

While depressive phases are marked by low mood, lack of drive, and loss of interest, manic episodes present with elevated or irritable mood, increased energy, and a reduced need for sleep.

The condition typically follows an episodic course with symptom-free intervals. Without treatment, it can lead to significant psychosocial strain. However, with early and consistent therapy, good stabilization is possible.

Symptoms

Symptoms vary depending on the phase:

Depressive episode:

  • Depressed mood

  • Loss of interest

  • Lack of drive

  • Sleep disturbances

  • Concentration difficulties

  • Feelings of guilt or hopelessness

Manic episode:

  • Excessively elevated or irritable mood

  • Increased talkativeness

  • Racing thoughts

  • Reduced need for sleep

  • Risk-taking behavior (e.g., financial impulsivity)

  • Inflated self-esteem up to grandiose ideas

Hypomania is a milder form of mania but also requires treatment.

Types

  • Bipolar I Disorder – at least one pronounced manic episode, often with depressive episodes

  • Bipolar II Disorder – recurrent depressive episodes and at least one hypomanic episode

  • Cyclothymic Disorder – chronically fluctuating but less pronounced mood states

Accurate classification is essential for treatment planning.

Causes

Bipolar disorder arises from a complex interaction of multiple factors:

  • Genetic predisposition

  • Neurobiological changes (including dysregulation of neurotransmitters)

  • Psychosocial stressors

  • Stress and disruptions of the sleep–wake cycle

Stressful life events can trigger episodes but are not the sole cause.