Symptoms of SAD may consist of difficulty waking up in the morning, morning sickness, tendency to oversleep and over eat, especially a craving for carbohydrates, which leads to weight gain. Other symptoms include a lack of energy, difficulty concentrating on or completing tasks, and withdrawal from friends, family, and social activities and decreased sex drive.[citation needed] All of this leads to depression, pessimistic feelings of hopelessness, and lack of pleasure which characterize a person suffering from this disorder.[citation needed] People who experience spring and summer depression show symptoms of classic depression including insomnia, anxiety, irritability, decreased appetite, weight loss, social withdrawal, decreased sex drive,[5] and suicide.