1 Depressed Mood
A person may report feeling “sad” or “empty” or may cry frequently. Children and adolescents may exhibit irritability.
2 Decreased Interest or Pleasure
A person may show markedly diminished interest or pleasure in all, or almost all, daily activities.
Significant changes in weight when not attempting to gain or lose (a gain or loss of 5% or more in a month) may be indicative of depression. In children, this may also present as a failure to make expected weight gains.
3 Weight Changes
4 Sleep Disturbances
Insomnia or sleeping too much may be a symptom of depression.
5 Psychomotor Agitation or Retardation
The person may be observed to be either agitated or restless or physically slowed down in their movements.
Deep fatigue or a loss of energy is a symptom of depression.
7 Feelings of Worthlessness or Guilt
A depressed person may feel that they have no value or they may feel inappropriately guilty about things they have no control over.
8 "Brain Fog"
A depressed person may have a diminished ability to think, concentrate or make decisions.
9 Thoughts of Death
A depressed person may have frequent thoughts of death and suicide, although they may or may not have an actual plan for carrying it out.