What are common causes and symptoms of depression?

Depression: Sometimes there's no immediately apparent "cause" for depression, but family history, drug/alcohol use, personal loss, trauma such as rape or bullying, etc, certain medications, and hormonal changes can all play a part. Symptoms include sad mood, loss of interest & enjoyment in activities lasting longer than 2 weeks, & disturbances in sleep, energy, and appetite. Can have suicidal thinking also.

Depression symptoms: Symptoms of depression include:a loss of interest in activities you used to enjoy, difficulty concentrating, change in sleep and/or appetite, fatigue, feelings of hopelessness, sadness, poor motivation, and irritabiliy. Causes include :family history of depression, medical illnesses (i.E hypothyroidism), side effects from medications, major life stressors, death/loss, substance use and history of abuse.