Seasonal affective disorder (SAD)

Reviewed:

7 months ago

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Overview

Seasonal Affective Disorder (SAD) is a specific type of depression that affects people based on changes in seasons, and it follows a predictable pattern each year. For most individuals, SAD symptoms emerge during the fall and persist through the winter months, leading to a decrease in energy levels and feelings of moodiness. Thankfully, these symptoms often subside during the cheerful spring and summer seasons. However, in rarer cases, SAD can also bring about depression in the spring or early summer, with relief arriving during the fall or winter months.

Treatment Options

If you experience symptoms of Seasonal Affective Disorder, there are several treatment options available. These include:

  • Light therapy (phototherapy) to simulate exposure to natural sunlight
  • Psychotherapy to address emotional challenges and develop coping strategies
  • Medications prescribed by a healthcare professional to manage symptoms

Recognizing the Signs

The signs and symptoms of SAD may vary depending on the season of onset:

Fall and Winter SAD

  • Oversleeping
  • Increased appetite, particularly for carbohydrates
  • Weight gain
  • Low energy levels and persistent fatigue

Spring and Summer SAD

  • Trouble sleeping (insomnia)
  • Reduced appetite
  • Weight loss
  • Agitation or anxiety
  • Heightened irritability

Impact on Bipolar Disorder

Individuals with bipolar disorder face an increased risk of developing Seasonal Affective Disorder. Some may experience episodes of mania associated with specific seasons. For instance, spring and summer can trigger manic symptoms or a less intense form of mania (hypomania), along with anxiety, agitation, and irritability. Conversely, these individuals might encounter depression during the fall and winter months.

Seeking Professional Help

While occasional feelings of sadness are normal, persistent and overwhelming emotions should not be ignored. If you find yourself consistently down for days and struggle to engage in activities you usually enjoy, it's crucial to seek support from a healthcare provider. This is especially important if your sleep patterns and appetite have changed, you rely on alcohol for comfort, or you have suicidal thoughts.

Causes and Risk Factors

The exact cause of Seasonal Affective Disorder remains unclear, but certain factors may contribute to its development:

  • Disruption of the biological clock (circadian rhythm) due to reduced sunlight during fall and winter
  • Decreased serotonin levels, which affect mood and may be triggered by limited sunlight exposure
  • Changes in melatonin levels, affecting sleep patterns and mood regulation

Some risk factors associated with SAD include being female, young adults, having a family history of depression or bipolar disorder, and living far from the equator where there are more significant seasonal variations.

Managing Complications

It's crucial to take the signs and symptoms of Seasonal Affective Disorder seriously, as untreated SAD can lead to various complications, such as social withdrawal, difficulties at school or work, substance abuse, and the development of other mental health disorders like anxiety or eating disorders. Additionally, it can lead to suicidal thoughts or behavior.

Prevention and Proactive Measures

While there's no guaranteed way to prevent Seasonal Affective Disorder, taking proactive measures early on can help manage and potentially lessen its impact. Individuals may benefit from starting treatment before their symptoms typically manifest in the fall or winter and continuing the treatment beyond the usual resolution period. For some, continuous treatment may be necessary to prevent symptoms from reoccurring.

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Brian Richards, MD

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