When one spouse is melancholic or depressed, does it mean that the marriage is in trouble?

Depression is a serious, often debilitating disease, with a variety of symptoms, including enervation and sleeplessness.

Depression can be sign that there are marital problems, since marital problems can have a great effect on health. On the other hand, marital problems could be due to depression, which can be a serious illness, caused by brain chemistry. Men, for example, often believe that their marriage is the cause of their depression, while the actual cause may be an imbalance of chemicals in the brain. Good medical care should be sought.