A depressive episode is usually referred to as a depressive episode, a prolonged and pronounced number of symptoms caused by a variety of causes, with the core symptoms being a depressed mood and loss of interest that is incompatible with the situation. The main features of depressive episodes are usually considered to be depressed mood, diminished interest, loss of pleasure, delayed reaction, decreased cognitive function, and somatic impairment.1. Depressed mood: Patients can clearly show long-term persistent depressed mood, which can appear as a depressed face, manifested as listlessness, full of sadness, often feeling pessimistic, sad or even desperate, producing a feeling that life is worse than death. Depressed mood persists almost most of the time and does not change easily with the change of environment; 2, diminished interest: the patient’s interest in the things or activities he used to like decreases or even loses, and he cannot bring up the energy to do anything, and it is difficult to feel the pleasant feeling in the past; 3, lack of pleasure: the patient cannot experience pleasure from ordinary activities, even things he used to like cannot be obtained from them. Even if they force themselves to participate in activities that appear to be interesting, they will not get pleasure or even become a burden, and their ability to experience pleasure is reduced; 4. Physical disorders: depressed patients may have difficulty falling asleep, light sleep and short sleep time, as well as dizziness, headache, loss of appetite, fatigue, sexual dysfunction and other physical disorders.