There is many reasons why people have depression. Loss of a family member, bullying, physically abused or mentally abused. Persistent Depressive Disorder is Depression that lasts about 2 years or more it could cause change in appetite, sleep to much or too little, also a lack of energy or fatigue. You could also have low self-esteem even have trouble concentrating and making decisions. You could also feel hopeless you would need therapy and sometimes medications. There is about 9 different depression or more I hope this helps.
