Head | Psychiatry | Paranoia (Symptom)
Paranoia refers to the perception or suspicion that others are hostile or aggressive motives against itself, when in fact there is no reason for this suspicion.
People who experience paranoia that others think are pursuing and have delusions about themselves as central figures in the scenes that actually have little relevance to them. Feelings of paranoia are less common but can cause severe paranoia, fear and anxiety can have a significant and pronounced effect on social functioning.
Researchers do not understand fully what chemical or physical changes in the brain cause paranoia. Paranoia is a prominent symptom that occurs in a variety of different mental disorders, as well as a symptom of certain physical diseases.
Feelings of paranoia can be seen with many psychological disorders such as schizophrenia, as well as a number of medical conditions ranging from Alzheimer disease to multiple sclerosis, which can affect brain function.