To determine whether you have depression, you can test the following two aspects: 1. Observe the clinical symptoms. Depression is a state of mind disorder characterized by significant and persistent depressed mood, so it is necessary to observe whether there are symptoms such as depressed mood and slowed thinking. 2. You can perform the test of depression self-assessment scale. The Depression Self-Rating Scale is a scale that reflects the patient’s subjective depressive state and is widely used to screen for depression. It consists of 20 questions. According to the patient’s performance in the past six months, the patient should answer which of the 20 questions belongs to the four conditions of “persistent, frequent, sometimes, none or occasionally”, and finally add up the scores of the 20 questions to get the total score. If the total score is more than 40, depression is present. The percentage can also be obtained by dividing the total score by 80. 50%-69% is mild depression, 70%-89% is moderate depression, more than 90% is severe depression, and less than 50% is no depression.