As the days become shorter and colder, many people experience changes in their mood, energy, sleep, and motivation. While it is common to feel less energetic during the winter months, for some people these changes are more significant. This may be Seasonal Affective Disorder (SAD), a form of depression that follows a seasonal pattern.
SAD is more than simply having the “winter blues.” It can affect relationships, work, sleep, appetite, and overall quality of life. Fortunately, it is treatable.
What Causes SAD?
The exact cause of SAD isn’t fully understood, but reduced exposure to sunlight appears to play an important role. Less daylight may affect the brain’s regulation of serotonin, melatonin, and the body’s internal sleep-wake clock, or circadian rhythm.
SAD is more common in people with a personal or family history of depression or other mental health conditions. It also tends to occur more frequently in women and in people who live farther north, where winter daylight hours are shorter.
What Are the Symptoms?
Winter-pattern SAD may include:
- Persistent sadness or low mood
- Loss of interest or pleasure
- Fatigue or low energy
- Sleeping more than usual
- Difficulty concentrating
- Social withdrawal
- Increased appetite or carbohydrate cravings
- Weight gain
- Irritability
- Feelings of hopelessness, guilt, or worthlessness
Some people describe feeling like they want to “hibernate” during the winter. If these symptoms occur every year around the same time and interfere with daily life, it may be more than a seasonal slump.
How Is SAD Treated?
Treatment depends on the individual and may involve one or several approaches.
Light therapy: Bright-light therapy is one of the most common treatments for winter-pattern SAD. A typical treatment involves sitting near a therapeutic 10,000-lux light box for approximately 30–45 minutes in the morning. Light therapy is generally most effective when used consistently and may be started before symptoms typically appear.
Psychotherapy: Cognitive behavioral therapy adapted for SAD can help people recognize negative thought patterns and develop strategies to remain active and engaged during the winter months. Behavioral activation, including intentionally scheduling enjoyable and meaningful activities, can also be helpful.
Medication: Antidepressant medication may be recommended for individuals with moderate to severe symptoms or recurrent seasonal depression. For people with a predictable seasonal pattern, treatment may sometimes begin before symptoms develop. Bupropion XL is FDA-approved to help prevent recurrent seasonal depressive episodes.
Lifestyle changes: Simple habits can support emotional well-being. Try getting outside during daylight hours, exercising regularly, maintaining a consistent sleep schedule, staying socially connected, and keeping a regular daily routine. Maximizing natural light in your home by opening blinds and curtains can also help.
Vitamin D: Reduced sunlight exposure can contribute to lower vitamin D levels. Although supplementation may be appropriate for people who are deficient, vitamin D is not considered a universal treatment for SAD. Talk with your healthcare provider about whether testing or supplementation is appropriate for you.
Don’t Wait Until Spring
One of the advantages of recognizing SAD is that the pattern can often be predictable. If you notice that your mood consistently declines every fall or winter, don’t wait until symptoms become severe before seeking help.
A mental health professional can help determine whether your symptoms are consistent with Seasonal Affective Disorder and develop an individualized treatment plan. With appropriate treatment, many people experience significant improvement and can enjoy the winter months without feeling that they are simply waiting for spring.
Seasonal depression is real, and you don’t have to suffer through it alone.
This article is for educational purposes only and is not a substitute for individualized medical or psychiatric care.
Dyana Thompson PMHNP- BC, PMH-C is a psychiatric mental health nurse practitioner and founder of Evolution Psychiatry, located in Wayne. She can be reached at 973-936-8108.
SAD is more than simply having the “winter blues.” It can affect relationships, work, sleep, appetite, and overall quality of life. Fortunately, it is treatable.