Early symptoms of mental illness, like other illnesses, are mild and atypical, and often go unnoticed or unrecognized as mental illness, resulting in delayed treatment and adverse consequences for the patient and family. Early identification of mental illness can be very beneficial to treatment. Early symptoms of mental illness can be manifested as follows: 1, personality changes: such as the original enthusiastic and collegial people become cold to people, distant from others, isolated and incompatible, few words, good solitude, avoiding friends and family and hostile, lazy life, undisciplined. Or the original very educated people become rude, good-tempered, rude to others. 2. Neurotic-like symptoms: such as headache, insomnia, easy fatigue, lack of concentration, emotional instability, and reduced ability to work and study. 3, emotional changes: early mood changes manifested as emotional high, smug, high, meddling, talk big, boastful, do things without end, tantrums, or depressed, depression, sorrow, sighing, self-blame, pessimism and anxiety, and even suicidal behavior; or mood swings, anxiety and tension, lack of adaptive emotional communication, etc.; or self-appreciation of the mirror, self-talk or self-appreciation in the mirror, talking to oneself, crying and laughing for no reason, etc. 4. Behavioral changes: some people show strange movements and behaviors, increased movements, dull and repetitive, purposeless; some behave slowly, live a lazy life, unable to work and take care of household chores; some collect some meaningless objects, even carry some fruit peels, waste paper and other unnecessary things; some repeatedly wash or show stereotypical ritual-like actions, etc. 5.Lack of concentration and memory loss: distraction, forgetfulness and reduced work efficiency. 6, sensitive and suspicious: such as someone suspected that others speak badly of him, and that every word, action and movement of others is directed against him; even think that what is on TV, in the radio, in the newspaper is also related to him; someone feels that his colleagues, neighbors, and even parents and brothers are harming her, fearful and uneasy; feel that everything around becomes unfavorable to him, etc. This kind of person is often convinced of his own ideas, and the persuasion and explanation of others cannot change his point of view. The early symptoms of mental illness are abnormal mental states before the mental illness becomes clear. To determine whether or not a mental illness is a mental illness, or what type of mental illness it belongs to, please make sure to go to a specialist for a i consultation and treatment.