Psychological disorder is an agreed-upon concept. It is generally understood that a psychological disorder is a condition in which the symptoms are mild, or in which the person experiences distressing emotions and is able to perceive that he or she is in a psychological conflict but is unable to do anything about it, and that it can be resolved without medication or psychotherapy, whereas a mental disorder or psychosis is a serious mental disorder for which psychiatric medication is the only solution. In fact, this understanding is biased. The term “mental disorder” is not used in the specialty of psychiatry and clinical psychology. In psychiatry, all abnormal mental activities and behaviors are included in the category of mental disorders when they reach a certain level of severity and duration, and for this purpose, international and national diagnostic criteria manuals have been developed. In the manual of diagnostic criteria, different detailed classifications and clear diagnostic criteria are made for mental disorders with varying degrees of clinical manifestations, such as neurosis, schizophrenia, etc. And in most books specializing in clinical psychology and medical psychology, various mental disorders, regardless of their severity, are categorized as pathological psychology. In terms of treatment, milder mental disorders such as neurosis are not only limited to psychotherapy, but often require a certain course of antidepressant or/and anxiolytic medication, while severe mental disorders such as schizophrenia, after antipsychotic medication, also require the necessary psychological rehabilitation during the recovery period. So, why not refer to mental disorders or psychological disorders as psychiatric disorders or mental illnesses, when both have the need for medication? Here is the issue of aligning with the international use of psychiatric terminology. In English, the concept of “disease” emphasizes biological causes and detectable biological indicators, while the concept of “disorder” focuses more on functional impairment. Because of the limitations of brain science research so far, no specific biological tests can be found for all types of mental abnormalities, therefore, the term “disorder” is more appropriate than “disease” and must be strictly enforced in any formal written records (e.g., medical records and published articles). The term “disorder” is therefore more appropriate than “disease” and must be strictly enforced in any formal documentation (e.g., medical records and published articles). However, in actual clinical work in psychiatry, it is sometimes customary for professionals to refer to “mental disorders” as “mental illnesses” and “patients with mental disorders” as “patients with mental illnesses. The term “mental illness” is also a term used by psychiatric professionals. ”Psychosis” is also an informal term that psychiatrists sometimes use to describe “psychotic symptoms” or “psychotic disorder,” which generally refers to the manifestations of schizophrenia with hallucinations, delusions, etc. The term “psychotic symptoms” or “psychotic disorder” is sometimes used by psychiatrists to describe the manifestation of schizophrenia with symptoms such as hallucinations and delusions. In addition, the term “antipsychotic” is also used to distinguish between “anxiolytic drugs” and “antidepressant drugs” in the commonly used psychiatric drugs.