<unk>  is a state of complete or near-complete lack of contact between an individual and society. It differs from loneliness, which reflects temporary and involuntary lack of contact with other humans in the world.<unk>  can be an issue for individuals of any age, though symptoms may differ by age group.<unk>  has<unk> milar characteristics in both temporary instances and for those with a historical lifelong<unk>  cycle. All types of<unk>  can include staying home for lengthy periods of time, having no communication with family, acquaintances or friends, and/or willfully avoiding any contact with other humans when those opportunities do arise.
Social isolation
Psychological resistance
Psychological resilience
Neglect
Social degeneration
Childhood trauma
Social rejection
Social stress