Psychological crisis refers to a serious disorder in the psychological state of the person concerned due to a sudden serious disaster, major life event or mental stress, to the extent that he or she is facing a mental breakdown or insanity. Psychological crisis can usually be categorized into 4 stages, i.e. alert stage, function deterioration stage, help-seeking stage and crisis stage. 1. Alertness stage: Traumatic stress events can increase the emotional anxiety level of the person concerned, often using coping mechanisms to resist the stress and discomfort caused by anxiety, and this stage is mainly characterized by heightened alertness in order to achieve inner balance. 2. Functional deterioration stage: When coping mechanisms fail to resolve the existing problems, and the traumatic stress reaction still persists, the level of emotional anxiety further increases, and the social adaptive functioning of the person concerned in this stage may be significantly impaired or reduced. 3. Help-seeking stage: The emotional, behavioral and psychiatric symptoms of the person concerned in this stage may be further aggravated, prompting him/her to seek and try to seek help from others. 4. Crisis stage: If the traumatic stress reaction of the person concerned has not been calmed down after the above three stages, the person concerned may show obvious personality disorder, behavioral withdrawal or mental illness, and some may even attempt suicide. Once such a situation is detected, active intervention should be carried out in a timely manner.