There are people suffering from depression who are unaware that they have depression and need to be actively treated with antidepressants. Depression, also known as depressive disorder, is characterized by significant and persistent depression as the main clinical feature, and is the main type of mood disorder. Patients are often depressed, sullen, grief-stricken, and even pessimistic and suicidal; severe cases can have hallucinations, delusions and other symptoms of psychosis, and each episode is at least two weeks long. You should do more physical exercise and develop a good mental state.