While hallucinations can occur in any of the five senses, the most common hallucinations in schizophrenia are auditory, usually experienced as hearing voices which are perceived as distinct from the person's own thoughts.

There are a number of other early warning signs that can indicate the presence of schizophrenia or another mental illness:

  • Difficulty in concentrating, poor memory, preoccupation with odd ideas, increased suspiciousness.
  • Changes in mood, lack of emotional response, rapid mood changes, inappropriate moods.
  • Odd or unusual behaviour, and unusual perceptual experiences
  • Sleep disturbances or excessive sleep and loss of energy.
  • Withdrawal and isolation from family and friends.
  • Decline in school or work performance.

None of these symptoms by themselves indicate the presence of schizophrenia or another mental illness. But if they are severe, persistent or recurrent, professional help should be sought as soon as possible.

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