Symptoms:

Symptoms usually build up slowly in the late autumn and winter months. Symptoms are usually the same as with depression:

• Increased appetite with weight gain (weight loss is more common with other forms of depression)
• Increased sleep and daytime sleepiness (too little sleep is more common with other forms of depression)
• Less energy and ability to concentrate in the afternoon
• Loss of interest in work or other activities
• Slow, sluggish, lethargic movement
• Social withdrawal
• Unhappiness and irritability

Signs and tests:

There is no real test for SAD. Your health care provider can make a diagnosis by asking about your history of symptoms.

The health care provider may also perform a physical exam and blood tests to rule out other disorders that are similar to SAD.

See also: Depression