Feeling sad, hopeless, worthless, or irritable most of the time Feelings of guilt and despair Feeling pessimistic about everything Lacking energy Concentration problem Loss of interest in activities once enjoyed Lack of Confidence Loss of appetite Difficulty sleeping Suicidal thoughts 
Feeling very happy, elated, or overjoyed Talking very quickly Feeling full of energy Feeling self-important Feeling full of great new ideas and having important plans Being easily distracted Being easily irritated or agitated Spending large sums of money on expensive and sometimes unaffordable items 
Genetics Family history A chemical imbalance in the brain Environmental factors 
Overwhelming problems in everyday life related to financial, work, or relationships Physical, sexual, or emotional abuse Loss of a loved one Physical illness Sleep disturbances 
Psychiatrist Clinical Psychologist
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