In the ward, at home, we often hear reports from medical staff or family members that some young elderly people often experience abnormal excitement, incoherent speech, psychomotor agitation, restless behavior, and expressions of consciousness often accompanied by errors (hallucinations) during the night. The entire ward (or family) is in a state of extreme disturbance by the delirious patient. The non-neurological ward (or family) cannot accurately determine the delirium and its treatment, and almost all the following work depends on the consultation plan of the related departments. The following is a clinical procedure for the recognition and treatment of delirium as an acute illness. Delirium is a pathological process in which the content of consciousness is altered, often with delusional behavior disorders, accompanied by behavioral disturbances, speech disorders and other processes; it is common in the excited state and can be partly expressed in the inhibited state, mostly with fluctuating and acute onset; it involves the elderly, critically ill patients and some adolescents; nearly 90% of the general population with the disease is accompanied by sleep cycle disorders. Delirium is a multi-causal disease: a susceptible population (with 1 susceptible factor) develops delirium through a complex interaction of predisposing factors. Susceptibility factors for delirium include: age >= 65 years, male, dementia, cognitive dysfunction, history of delirium, depressed patients, dysfunction, braking, low activity, history of falls, drugs, acute alcoholism, alcohol abuse, and severe infections. Triggers of delirium include medications, neurological disorders, co-infections, metabolic abnormalities, surgery, physical braking, pain, admission to the intensive care unit (ICU), catheter use, and sleep deprivation. Drugs that can induce delirium include sedative-sleeping drugs, narcotics, anticholinergic drugs, simultaneous use of multiple drugs and withdrawal from alcohol or addictive drugs can also induce delirium. The management of delirium is divided into two parts: causative and symptomatic: the causative treatment includes correcting the cause, stopping unnecessary drugs and avoiding the simultaneous use of multiple drugs. For symptomatic treatment, non-pharmacological measures are important, such as encouraging the presence of family members, providing time-oriented cues (e.g., clocks, calendars), reducing environmental changes, ensuring that the staff in contact with the patient does not change frequently as much as possible, repeatedly providing orientation information, especially before manipulation, providing effective sensory aids (e.g., hearing aids, glasses), and avoiding interruption of sleep whenever possible, keeping in mind that braking should only be the Remember that braking should only be the last measure taken to ensure patient safety. For patients presenting with agitated or psychotic symptoms, medication should be given in addition to non-pharmacological treatment. In our hospital, the most commonly used drugs are olanzapine and quetiapine. The drug regimen is generally decided according to the patient’s clinical presentation, and it is recommended to continue using them for 1 to 2 weeks after the symptoms have stabilized. Finally, the application of analgesics should be avoided (unless there are significant pain symptoms), and the drugs should be applied in small doses and gradually increased. When drug use conflicts with certain diseases such as Parkinson’s disease and pain-relieving morphine drugs, it is recommended to choose short-term symptomatic treatment.