Depressive episodes and depression refer to the same condition; depressive episodes are also known as depression. Especially clinically, when patients experience depressive episodes, they mainly exhibit low mood, slow thinking, lack of interest and pleasure, diminished will and activity, overall subdued emotional state, sluggish and blank brain responses, lack of interest in daily life, and importantly, an inability to feel pleasure or control. Patients often feel passive, lethargic, and lack anticipation for future life. They typically experience decreased appetite, sleep disturbances, reduced sexual function, and fatigue. Patients frequently describe themselves as incapable, useless, incompetent, and hopeless, leading to low self-esteem and self-blame significantly contributes to their issues. They also feel like a burden to society, and thus, severe cases may include suicidal thoughts and behaviors, which are relatively common symptoms in clinical settings.