The cause of schizophrenia is still unclear. Some theories about the cause of this disease include: genetics (heredity), biology (abnormalities in the brain’s chemistry or structure); and/or possible viral infections and immune disorders.
Scientists recognize that the disorder tends to run in families and that a person inherits a tendency to develop the disease. Similar to some other genetically-related illnesses, schizophrenia may appear when the body undergoes hormonal and physical changes (like those that occur during puberty in the teen and young adult years) or after dealing with highly stressful situations.
The signs of schizophrenia are different for everyone. Symptoms may develop slowly over months or years, or may appear very abruptly. The disease may come and go in cycles of relapse and remission.
Hearing or seeing something that isn’t there
A constant feeling of being watched
Peculiar or nonsensical way of speaking or writing
Strange body positioning
Feeling indifferent to very important situations
Deterioration of academic or work performance
A change in personal hygiene and appearance
A change in personality
Increasing withdrawal from social situations
Irrational, angry or fearful response to loved ones
Inability to sleep or concentrate
Inappropriate or bizarre behavior
Extreme preoccupation with religion or the occult