Early identification of mental illness, early detection and early treatment, which can improve the effectiveness of treatment and reduce the rate of disability, the following conditions may be the early symptoms of mental illness: sleep disorders: often manifested as difficulty in falling asleep or unable to sleep, day and night reversal. Insomnia in people with mental illness is different from insomnia in normal people, and there is no obvious reason for insomnia in people with mental illness. Secondly, waking up early should also be considered as an early manifestation of mental illness. Memory disorders: These are characterized by memory loss, frequent forgetfulness, and forgetfulness of things that have just been done. Excessive sensitivity and paranoia: particularly sensitive to the words and actions of people around you, catching the wind and making things out of thin air. Personality changes: such as the usual extrovert, suddenly become silent, do not fit in; or introverted people suddenly become enthusiastic, optimistic and sociable and so on. Emotional and behavioral changes: easy to lose temper, emotional instability, abnormal behavior. If there are any of the above manifestations, it is recommended to consult a doctor in time for early diagnosis and treatment.