Depression is a very common mental illness that is characterized by low mood, depression, unhappiness, lack of interest and other core symptoms, as well as low self-esteem, self-guilt, self-blame, suicide and other symptoms and manifestations. Many depressed people start with a low mood and a lack of happiness, and slowly develop into pessimism and disappointment about the future, and even think that the future is dark, easily aggravated, tearful and even tearful. If you have such symptoms and performance and the symptoms last for more than 2 weeks, it is very likely to be depression. If you have such symptoms, you must take active treatment and intervention, especially medication and psychological treatment, and you must not be careless.