What are the signs of very severe schizophrenia?

Signs: Signs of schizophrenia can be social isolation, deterioration in hygiene, paranoia (i.e. The fbi is watching them), inapproriate laughter, hallucinations, making irrational or odd statements, appear emotionless or unmotivated, may abandon hobbies and activites and their performance at work or school deteriorates.This link gives moreinfo: http://www.Nimh.Nih.Gov/health/topics/schizophrenia/index.Shtml.

Hallucinations: By definition, schizophrenia is about psychosis. Psychosis means the patient is getting external stimuli from the environment through one or more of his or her five senses, that does not objectively exist. In other words there are auditory,visual, olfactory, gustatory, and tactile hallucinations that can be experienced by the patient. Auditory hallucinations, however, are the most common.