symptoms of sad
If you have seasonal affective disorder(SAD), you will usually have symptoms of depressionduring the winter when there is less daylight (October through April). Symptoms of SAD include: 1  Difficulty concentrating. 2  Low energy and fatigue.  Reduced interest in daily activities, especially social activities.
The result of there not being enough serotonin is feelings of depression along with symptoms of fatigue, carbohydrate craving, and weight gain. SAD usually starts in young adulthood and is more common in females than in males. Some people with SAD experience very mild symptoms and feel out of sorts or irritable. Others have debilitating symptoms that interfere with relationships, productivity, and activities of daily living.