<unk>  is<unk>  caused by thoughts of one's own<unk> , and is also referred to as thanatophobia (fear of<unk> .<unk>  differs from necrophobia, which is the fear of others who are dead or dying. Psychotherapist Robert Langs proposed three different causes of<unk> : predatory, predator, and existential. In addition to his research, many theorists such as Sigmund Freud, Erik Erikson, and Ernest Becker have examined<unk>  and its impact on cognitive processing.<unk>  has been found to affect people of differing demographic groups as well; such as men versus women, young versus old, etc. Additionally, there is<unk>  caused by<unk> -recent thought-content, which might be classified within a clinical setting by a psychiatrist as morbid and/or abnormal. This classification pre-necessitates a degree of<unk>  which is persistent and interferes with everyday functioning. Lower ego integrity, more physical problems and more psychological problems are predictive of higher levels of<unk>  in elderly people perceiving themselves close to<unk> .<unk>  can cause a person to become extremely timid or distressed when discussing anything to do with<unk> . Findings from one systematic review demonstrated that<unk>  features across several mental health conditions. One meta-analysis of psychological interventions targeting<unk>  showed that<unk>  can be reduced using cognitive behavioral therapy.
Death anxiety
Self-hatred
Body image disturbance
Somatic experiencing
Tolerated illness
Distress 
Happy life expectancy
Unipolar emotions