Woman with bipolar disorder holding mask, feeling depressed and happy

What are the Differences Between Bipolar I and Bipolar II Disorders?

Bipolar disorder is a mental health condition characterized by extreme mood swings that include emotional highs (mania or hypomania) and lows (depression). There are several types of bipolar disorder, with Bipolar I and Bipolar II being the most common. Understanding the differences between these two can help in recognizing symptoms and seeking appropriate treatment. Here’s a detailed look at how Bipolar I and Bipolar II disorders differ.

What is Bipolar I Disorder?

Manic Episodes

Bipolar I disorder involves the presence of at least one manic episode. These episodes involve an abnormally elevated, expansive, or irritable mood lasting at least one week, or any duration if hospitalization is necessary. Symptoms include increased energy, reduced need for sleep, grandiosity, rapid speech, racing thoughts, distractibility, and risky behaviors (e.g., spending sprees, unprotected sex, reckless driving).

Depressive Episodes

Depressive episodes are common in Bipolar I but not required for diagnosis. These episodes involve a persistent feeling of sadness or a lack of interest in outside stimuli, lasting at least two weeks. Symptoms include fatigue, changes in appetite, feelings of worthlessness or guilt, difficulty concentrating, and suicidal thoughts.

What is Bipolar II Disorder?

Hypomanic Episodes

Bipolar II disorder is diagnosed when a person experiences at least one hypomanic episode and one major depressive episode. Hypomanic episodes are similar to manic episodes but less severe. They last at least four consecutive days and do not cause significant impairment in social or occupational functioning. Symptoms include elevated mood, increased activity or energy, inflated self-esteem, decreased need for sleep, talkativeness, and racing thoughts.

Depressive Episodes

Depressive episodes are required for the diagnosis of Bipolar II disorder. Similar to those in Bipolar I, these episodes involve intense depressive symptoms lasting at least two weeks. Symptoms include overwhelming sadness, loss of interest or pleasure in most activities, significant weight loss or gain, insomnia or hypersomnia, fatigue, and recurrent thoughts of death or suicide.

Key Differences Between Bipolar I and Bipolar II

Severity of Mania

Bipolar I involves full-blown manic episodes that are severe enough to cause significant impairment, require hospitalization, or include psychotic features. Bipolar II causes hypomanic episodes that are less severe and do not cause significant impairment or require hospitalization.

Frequency and Severity of Depressive Episodes

The depressive episodes involved in Bipolar I can occur but are not necessary for diagnosis. Major depressive episodes are required for a Bipolar II diagnosis and tend to be more frequent and severe compared to Bipolar I.

Impact on Functioning

The manic episodes that occur with Bipolar I can severely disrupt daily life, leading to social, occupational, and interpersonal difficulties. The hypomanic episodes with Bipolar II may not cause significant disruption, but the depressive episodes can lead to major impairments in daily functioning.

How Bipolar Disorders Can Lead to Substance Use

Having Bipolar disorder increases the chances for developing a substance use disorder. Here are the reasons why these two conditions are interrelated:

  • Self-medication. During manic phases, individuals may turn to stimulants to enhance euphoric feelings or maintain high energy levels. In depressive phases, they may use alcohol or opioids to numb emotional pain or elevate their mood. 
  • Impulsivity and risk-taking. Mania is associated with heightened impulsivity and poor judgment, leading to risky behaviors like drug and alcohol use. Individuals may also feel invincible and disregard the risks of substance use. 
  • Co-occurring mental health conditions. Individuals with Bipolar disorder often experience depression and anxiety. This can drive them to use substances to cope with their symptoms. 
  • Biological factors. There may be a genetic link between Bipolar disorder and substance use disorders. Individuals with a family history of both conditions are especially at risk. 

Diagnosis and Treatment

It can feel overwhelming to have Bipolar disorder, especially when it co-occurs with substance use and/or other mental health conditions. However, rest assured that help is available when you are ready. Here is what Bipolar disorder treatment involves: 

Diagnosis

A Bipolar I diagnosis requires at least one manic episode, which may or may not be followed by hypomanic or depressive episodes. A Bipolar II diagnosis requires at least one hypomanic episode and one major depressive episode, with no history of manic episodes.

Treatment

Medications, such as mood stabilizers (e.g., lithium), antipsychotics, and antidepressants, are commonly used to manage symptoms of both types of Bipolar disorder. Cognitive-behavioral therapy (CBT), psychoeducation, and family therapy can also help individuals manage their condition and improve their quality of life.

Lifestyle Changes

To manage the symptoms of Bipolar disorder and maintain good mental health, it’s important to exercise, eat a healthy diet, get adequate sleep, and practice stress management techniques.  

Conclusion

While Bipolar I and Bipolar II disorders share some similarities, they differ significantly in the severity and type of episodes experienced. Recognizing these differences is essential for proper diagnosis and treatment. If you or someone you know is struggling with mood swings or symptoms of Bipolar disorder, contact Awakenings Treatment Center today.