Seasonal Affective Disorder (SAD)
At Perimeter Behavioral Health, we understand how changes in seasons can impact your mood and overall wellbeing. As the days grow shorter and sunlight becomes scarce, many people notice shifts in energy and motivation. While feeling a little slower or more tired in the darker months is common, some individuals experience a more significant change known as Seasonal Affective Disorder (SAD) — a type of depression that follows a seasonal pattern.
What Is Seasonal Affective Disorder?
Seasonal Affective Disorder is a type of depression that typically occurs during certain times of the year, most often in the fall and winter when daylight hours are shorter. Less commonly, some people experience the reverse pattern, with symptoms appearing in spring or summer.
Common Symptoms
Symptoms of SAD are similar to depression but are linked to seasonal changes. Common signs include:
- Persistent fatigue or low energy
- Increased sleep time or difficulty waking in the morning
- Lack of motivation and reduced interest in activities once enjoyed
- Feelings of hopelessness or sadness
- Difficulty concentrating
- Changes in appetite, often craving carbohydrates
- Social withdrawal or feeling “slowed down”
*Winter-pattern SAD often includes oversleeping, overeating, and weight gain.
*Summer-pattern SAD may involve insomnia, restlessness, decreased appetite, or anxiety.
Why Does SAD Happen?
While the exact cause isn’t fully understood, research suggests that changes in sunlight exposure affect the body’s circadian rhythm, melatonin, and serotonin levels—all of which influence mood, energy, and sleep.
Shorter days can increase melatonin production (making you feel sleepier) and decrease serotonin levels (lowering mood), which explains why symptoms often begin as daylight hours shrink in the fall.
Who Is Most Affected?
SAD can affect anyone, but it is more common in:
- Women
- People living farther from the equator
- Individuals with a history of depression or bipolar disorder
- Young adults and teens, though it can occur at any age
When to Reach Out for Help
If you notice your mood or motivation consistently drop with seasonal changes—and symptoms interfere with daily life—it’s important to seek support from a mental health professional. SAD is a treatable condition, and early intervention can make a significant difference.
Treatment and Self-Care Options
1. Light Therapy
Using a light therapy box that mimics natural sunlight can help regulate your circadian rhythm and improve mood. Most people use it for 20–30 minutes each morning during darker months.
2. Vitamin D Supplementation
Low vitamin D levels have been linked to SAD, so supplementation may be helpful, especially for those with limited sun exposure.
3. Physical Activity
Regular movement, even short walks outside, can boost serotonin and energy levels.
4. Maintain Structure
Keeping consistent sleep, meal, and activity schedules helps stabilize mood and energy.
5. Professional Treatment
Therapy, especially Cognitive Behavioral Therapy, and, when appropriate, antidepressant medications, can be very effective. Clinicians can tailor a plan to address both biological and emotional aspects of SAD.
Final Thoughts
Seasonal Affective Disorder is more than just the “winter blues.” It’s a real condition that can affect mood, focus, and daily functioning. The good news is that effective treatments exist, and with the right support, it’s possible to feel more like yourself again—no matter the season.
If you recognize these symptoms in yourself or someone you care about, contact the team at Perimeter Behavioral Health to explore treatment options and get support. Early care can make a world of difference.