What is Seasonal Affective Disorder (SAD)?

Seasonal Affective Disorder (SAD) is a mental health condition classified as a subtype of major depressive disorder or bipolar disorder. This disorder is characterized by a recurring seasonal pattern, where depressive episodes coincide with changing seasons. It is not merely a passing case of "winter blues"; it is a condition that can significantly affect how a person thinks, feels, and handles daily activities [2] [3].

Common Symptoms and Patterns

Symptoms of this disorder typically last for about 4 to 5 months of the year. Although symptoms vary based on the type of disorder, general depression symptoms include low energy, loss of interest in activities, difficulty concentrating, and changes in appetite and sleep [2]. It is important to note that the disorder does not always manifest repeatedly every year; data indicates that 30 to 50 percent of those affected may not exhibit symptoms in consecutive winters [3].

• Winter Pattern: Begins in the fall or winter and clears in the spring or summer. Characteristic symptoms include hypersomnia (oversleeping), increased appetite (especially for carbohydrates), weight gain, and social withdrawal [2] [3].
• Summer Pattern: Less common, starting in the spring or summer. Symptoms include insomnia (difficulty sleeping), poor appetite and weight loss, restlessness, anxiety, and in some cases, aggressive behavior [2] [3].

How Seasonal Affective Disorder is Diagnosed

Diagnosing Seasonal Affective Disorder requires an evaluation by a mental health professional. Feeling sad during a specific season is not sufficient for a diagnosis; precise medical criteria must be met. These criteria include the occurrence of depressive episodes during specific seasons (winter or summer) for at least two consecutive years, provided that these seasonal episodes are more frequent and severe compared to any other depressive episodes a person may experience at other times of the year [2].

A doctor may ask the patient to complete symptom assessment questionnaires, and it is essential to conduct a comprehensive medical examination to rule out underlying physical causes that may mimic symptoms of depression [1] [2]. For more details on ways to manage this condition, you can view Seasonal Affective Disorder (SAD): Beyond the Winter Blues and How to Treat It (Arabic).

Causes and Treatment Options

Researchers believe that Seasonal Affective Disorder is linked to disruptions in the body's circadian rhythm (biological clock), as those affected have difficulty adapting to changes in daylight and darkness between seasons. Sunlight affects serotonin and melatonin levels in the brain, which are chemicals that regulate mood and sleep cycles [2] [3].

Effective treatment options are available, including light therapy (using a 10,000-lux bright light box), psychotherapy such as Cognitive Behavioral Therapy (CBT-SAD), antidepressant medications, or Vitamin D supplements [2]. A specialist should always be consulted to develop an individualized treatment plan.

When to Seek Urgent Help

If symptoms include thoughts of self-harm or suicide, or if they affect the ability to perform daily tasks, professional help must be sought immediately. In emergencies, contact local crisis hotlines or go to the nearest emergency department. Talking to a specialist is a fundamental step to receiving appropriate support and developing a safety plan if necessary [1] [2].

Medical references

• Psychotherapies
• Seasonal Affective Disorder
• Seasonal affective disorder: MedlinePlus Genetics