Seasonal Affective Disorder, Persistent Depressive Disorder, and Major Depressive Disorder all experience the following symptoms2:
Persistent sad, anxious, or “empty” mood
Feelings of hopelessness, or pessimism
Irritability
Feelings of guilt, worthlessness, helplessness
Loss of interest or pleasure in hobbies and activities
Decreased energy or fatigue
Moving or talking more slowly
Feeling restless or having trouble sitting still
Difficulty concentrating, remembering, or making decisions
Difficulty sleeping, early-morning awakening, or oversleeping
Appetite and/or weight changes
Thoughts of death or suite, or suicide attempts
Aches or pains, headaches, cramps, or digestive problems without a clear
physical cause and/or that do not ease even treatment
Depression among college students 