Feeling low sometimes is normal, especially during or after distressing life events. However, having a sustained low mood or lost interest in activities for most of the day, nearly every day for two weeks can be an sign of depression. Some common symptoms include:

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• Poor concentration, inattentiveness, and indecisiveness

• Feelings of worthlessness or excessive guilt

• Recurrent thoughts of death, suicidal ideation, or attempted suicide

• Insomnia or excessive sleep

• Significant changes in appetite or weight

• Reduced energy or fatigue

• Noticeable slowing of thought and physical movement.

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Anyone can be affected by depression, but difficult experiences such as childhood trauma, abuse, or neglect, life changes, bereavement, prolonged stress, health problems, work or school bullying, and family or relationship problems can increase vulnerability to depression. Lifestyle factors such as sleep, diet, and exercise as well as alcohol and recreational drug use can also increase susceptibility to depression.