In terms of clinical experience, the following are the reasons why psychosis cannot be cured: First, the disease is inherently difficult to treat, because psychosis is now a world problem. Secondly, many patients reduce or even stop their medication midway, which is one of the main reasons why psychosis is not always treated. Third, changes in environmental factors, such as new things happening in the family, and new stimuli to the patient. Fourth, eating some irritating food causes the disease to recur. Fifth, the disease is not detected at an early stage and is not treated in a timely manner, resulting in prolonged illness.