(HealthDay News) -- Seasonal affective disorder (SAD) is characterized by a series of mood changes that appear year after year as the seasons change -- most often as the weather gets colder.
The American Academy of Family Physicians says symptoms of SAD often include:
A sudden craving for sweet or starchy foods, changes in appetite or gaining weight.
Lack of energy, feeling tired or sleeping more than usual.
Anxiety, irritability or having difficulty concentrating.
Unusual sensitivity to social rejection.
Feeling guilty or hopeless.