Depression is a state of low mood and aversion to activity that can affect a person’s thoughts, behavior, feelings and sense of well-being.Depressed people can feel sad, anxious, empty, hopeless, worried, helpless, worthless, guilty, irritable, hurt, or restless. They may lose interest in activities that once were pleasurable, experience loss of appetite or overeating, have problems concentrating, remembering details, or making decisions, and may contemplate, attempt, or commit suicide. Insomnia, excessive sleeping, fatigue, loss of energy, or aches, pains, or digestive problems may also be present.

Confusion (from Latin confusĭo, -ōnis, noun of action from confundere “to pour together”, or “to mingle together” also “to confuse”) is the state of being bewildered or unclear in one’s mind about something.

Confusion may result from a relatively sudden brain dysfunction. Acute confusion is often called delirium (also called acute confusional state),although delirium also includes a much broader array of disorders than confusion (e.g. inability to focus attention; and various impairments in awareness, or temporal and spatial orientation).

Confusion may also result from chronic organic brain pathologies such as dementia.