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First her treatment is good. Schizophrenia
respond well to medicine but it is not treatable by simple life style modification. This illness is not curable but controllable with medicines in most of the cases.
Apart from that symptom severity may change according to stress
level, nature of psychopathology, treatment compliance and change in medicine. This may be one of the reason for change in her symptoms in different circumstances.
I hope this information has been both informative and helpful for you.
Wish you Good Health.
Dr. Ashish Mittal