Mental illness and mental illness, the main differences are as follows: 1. Mild psychological problems can be coped with by simple psychological counseling and psychotherapy, while mental illness, especially in acute episodes of mental illness, there is a risk of impulsivity, injury, suicide, destruction, and the risk is extremely high, which usually requires mandatory hospitalization to cope with comprehensive treatment; 2. Mental illness dominant symptoms, usually depression , anxiety, fear, and insomnia. The dominant symptoms of mental illness are various hallucinations, including auditory hallucinations, visual hallucinations, etc., and various delusions, such as suspicions that someone is harming them, talking about them, and saying bad things about them. The main symptoms of mental illness also include confused thinking, abnormal behavior, self-talk, self-laughing and other psychotic symptoms; 3. Self-control: Patients with mental illness are usually able to objectively evaluate and correctly understand the various psychological problems they have, and have a pronounced sense of pain and actively seek treatment. Patients with mental illness, usually do not have a correct understanding of their psychiatric symptoms, lack the ability to reality check and lack the ability to criticize, and may even make various excesses under the domination of pathological symptoms; 4. In the acute phase of the disease, mental illness refuses treatment, and psychological illness actively seeks treatment.