There are only two situations in psychiatry that require an emergency risk assessment, one in which the patient is at risk for injurious behavior, and the other in which the patient may be at risk for self-injury. The purpose of the risk assessment is to: 1) determine the possible adverse consequences for the patient; 2) determine the factors that may precipitate the patient’s risky behavior; 3) determine the factors that may prevent the patient from engaging in risky behavior; and 4) determine what measures can be taken immediately. In general, patients with major depressive disorder, elderly males, poor support systems, low socioeconomic status, and a history of previous suicides are all high risk factors for self-injury or suicide. And schizophrenia, command hallucinations, males, and previous history of violence suggest a higher risk of injury. Measures can be taken to reduce the risk for different situations: such as warning the patient’s guardian in advance and taking precautions against the patient’s possible behavior; notifying the police in case of threats to personal safety; strictly checking the patient’s belongings before admission; and forcing the patient to be hospitalized in case of emergency.