1. What is psychosis? Psychosis is a general term for a group of disorders in which brain function is disturbed due to various harmful factors and mental activity is abnormal in clinical manifestations. It is divided into severe psychosis and mild psychosis. Mild refers to the absence of serious and persistent mental abnormalities, including neuroses and certain psychological disorders. Severe is what we often call “crazy” and “epileptic”. It is because the person’s mental activity has become impaired, and often makes some strange behavior that is incomprehensible, and sometimes also makes some behaviors that endanger oneself and society, such as laughing bitterly for no reason, talking to oneself, babbling, hurting people and destroying things, running wildly and shouting, etc., often unable to adapt to society and lack of awareness of their own diseases, such as schizophrenia, mania, etc. 2. Psychiatric treatment Psychiatric treatment currently includes psychotherapy, medication and surgery. Medication includes chlorpromazine, fenazepine, clozapine, olanzapine and others, whose effects are mainly antipsychotic, non-specific sedation and prevention of disease relapse. For epileptic psychosis, obsessive-compulsive delusions, suicide attempts, schizophrenia and aggressive behaviors, surgical treatment is feasible. The theoretical basis of surgery is to use stereotactic techniques to change the function of brain tissues related to abnormal mental activity, to create foci of destruction in loops or areas of the limbic system, to interrupt certain pathways between them, to adjust brain function, and to achieve the purpose of treating mental illness. The 210th PLA Hospital has invested heavily in introducing the most advanced international frameless brain stereotactic instrument and imported radiofrequency treatment system, using CT and MR to locate rake points, so that the positioning accuracy reaches cellular level, and the surgery is performed under computer assistance, making the positioning more accurate and efficient, ensuring safe and reliable surgery, which not only treats the disease but also preserves the normal neurological function to the greatest extent. It has the advantages of no craniotomy, small injury, fast reply and high cure rate.