It is possible that the confusion coming out of the ICU is related to the fact that the patient is still relatively weak, and the patient may have cognitive impairment. Then, as the patient recovers from the treatment, the feeling of confusion will be slowly restored. It may also be related to the patient’s experience in the ICU, for example, during the treatment in the ICU, the patient may have undergone therapeutic measures, such as intubation or even tracheotomy, which may cause some mental distress to the patient, resulting in fear, nervousness and anxiety, and even sensitivity and paranoia. In addition, it may also be related to the patient in the ICU to see the death of patients around, may be affected by this kind of shock, more of a death anxiety performance. Then benzodiazepine anti-anxiety drugs or obvious mood stabilizing drugs, such as antipsychotic drugs olanzapine, quetiapine, etc. can be taken.