1. Observe emotional changes: whether you feel low mood, lose interest and happiness for a long time, whether you are prone to irritability, irritability or anxiety.
2. Pay attention to physical reactions: whether there are symptoms such as sleep disorders, changes in appetite, weight gain or loss, fatigue and weakness, difficulty concentrating, memory loss, or decreased self-worth.
3. Conduct psychological testing or counseling: Preliminary assessment can be made through some online depression self-assessment scales, but the most accurate diagnosis still requires seeking the help of professional psychologists or psychological counselors for face-to-face assessment and diagnosis.