Health paranoia

Paranoid psychosis is related to personality. Patients with this disease generally belong to paranoid personality. Judging from your description, he should be under the illusion of being killed. This type of schizophrenia is harmless to others and society. Personality is a very stable psychological characteristic, which is not easy to change, so the prognosis of paranoid schizophrenia is generally not very good, depending on the severity of the disease. I suggest not telling him for the time being. Telling him that his illness can't be cured will increase his mental burden. If the prognosis given by the hospital is not ideal, let him go. What children should do is to spend more time with the elderly, talk to him more, slowly divert the attention of the elderly, and so on. Such treatment will have a good effect on the condition.