Recently, mentally ill people have been provoking incidents in public places, and according to the investigation, the perpetrators are suffering from mental illness. Internationally, it is not uncommon for mentally ill people to suffer violent injuries caused by sudden episodes of illness. Why do mentally ill people suddenly go berserk and cause trouble? How should society as a whole respond to such outbursts and how should these patients be treated properly? Functional neurologists have conducted a preliminary analysis of many of these issues. These events include cursing, hitting, destroying, scratching, chasing, provoking, destroying, etc. The vicious violent behavior of psychiatric patients is closely related to the abnormal function of their brain’s prefrontal lobe, limbic system, etc. Functional abnormalities in these areas can lead to paranoid thinking and delusions of victimization, which can be accompanied by hallucinations and hallucinations. Once a psychotic patient develops delusions of victimization, he initiates an overreaction, which leads to the initiation of aggressive behavior. Due to the suddenness of the attack, the public is vulnerable to accidental injury in the absence of defensive awareness. In daily life, for strangers who think paranoid, behave strangely and are prone to rage, the public should raise their vigilance and awareness of prevention, try to avoid head-on conflicts with them, and take the initiative to seek help from security managers in case of trouble to help solve the problem. Patients with mental illnesses, such as mania, paranoid psychosis, bipolar disorder, mental retardation with aggressive behavior, schizophrenia, etc., should be actively treated with medication and physical therapy if necessary, under the premise of a clear diagnosis. Most patients with psychiatric disorders can be well controlled by medication. However, for patients with refractory psychiatric disorders, the effect of medication is mostly unsatisfactory, and a small number of patients refuse to take medication, while some are forced to stop taking medication because of serious side effects. Stereotactic minimally invasive neuromodulation surgery is a safe and reliable procedure that precisely locates abnormal nerve clusters in the brain. The treatment can immediately eliminate the patient’s psychiatric symptoms and violent aggressive behavior. It is easier to accept family and social management after surgery, which helps them return to a healthy social and family life.