Patients with mild depression also have the possibility of relapse. Clinical research investigations have found that systematic antidepressant treatment can lead to clinical recovery in 85% of patients. However, even with persistent and standardized treatment, nearly one-fifth of patients still experience relapse. This signifies that some patients may have a relapse rate exceeding 70% if they cease treatment. For those who recover, there is still a one-fifth chance of relapse within six months, and nearly half might relapse within two years after the initial episode. Therefore, relapse is a significant challenge for depression patients. Thus, treatment should be systematic and standard, including pharmacotherapy. Additionally, psychotherapy plays a crucial role in treating depression by improving patients' irrational cognitive patterns and adjusting their cognitive reconstruction systems, ultimately achieving a healed state.