Why People Get Mentally Unwell

Major mental illnesses such as schizophrenia or bipolar disorder rarely appear “out of the blue.” Most often family, friends, teachers or individuals themselves begin to recognize small changes or a feeling that “something is not quite right” about their thinking, feelings or behavior before a illness appears in its full-blown form.Sleep or appetite changes — Dramatic sleep and appetite changes or decline in personal care
Mood changes — Rapid or dramatic shifts in emotions or depressed feelings
Withdrawal — Recent social withdrawal and loss of interest in activities previously enjoyed
Drop in functioning — An unusual drop in functioning, at school, work or social activities, such as quitting sports, failing in school or difficulty performing familiar tasks
Problems thinking — Problems with concentration, memory or logical thought and speech that are hard to explain
Increased sensitivity — Heightened sensitivity to sights, sounds, smells or touch; avoidance of over-stimulating situations
Apathy — Loss of initiative or desire to participate in any activity
Feeling disconnected — A vague feeling of being disconnected from oneself or one’s surroundings; a sense of unreality
Illogical thinking — Unusual or exaggerated beliefs about personal powers to understand meanings or influence events; illogical or “magical” thinking typical of childhood in an adult
Nervousness — Fear or suspiciousness of others or a strong nervous feeling
Unusual behavior – Odd, uncharacteristic, peculiar behavior
https://www.psychiatry.org/patients-families/warning-signs-of-mental-illness