Depression itself is a recurrent disorder, some patients may have a relapse after the first time, but some patients may have a relapse at a fixed time, for example, some patients are prone to relapse in spring, some patients are prone to relapse in autumn, most of the depression is related to the season, called periodic depression. Some patients with depression may relapse at a different time of the year without a life event, or at a different time of the year without a life event. And most people with cyclical depression have a relationship with the seasons. For example, in spring, we know that spring is the season of high incidence of illness. There’s an old saying that cauliflowers are yellow and crazy, which probably means that mental illnesses tend to relapse in spring. For example, some children born in late autumn or winter have less sunshine because of the cold weather, so there are studies that children born in this period may have a higher incidence of depression in spring, but some patients have a higher incidence of depression in autumn, so this kind of cyclic depression may be related to season. So if you have depression, you should pay attention to prevention in the fall or spring.