As common as depression is—about one person in 10 experiences depression in any given year—it still eludes complete understanding. There does not seem to be a single cause; rather many factors ...

A large international study led by researchers at the Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, shows that major depressive disorder (MDD) not only increases risk ...

Depression is characterized by a persistent low mood that can affect quality of life. If symptoms usually only occur in the winter months, it may be seasonal affective disorder (SAD), or major ...

The core experiences of depression — changes in energy, activity, thinking, and mood — have been described for more than 10,000 years. The word “depression” has been used for about 350 years. Given ...

If you have idiopathic hypersomnia (IH), you know it can affect your physical health. But it can also affect your mental health. About 30% of people diagnosed with IH also have depression. A dual ...

Poor hygiene habits and depression are closely linked. Skipping brushing or neglecting sleep hygiene may raise your ...

Many people view the urge to have children as deeply personal, tied to their sense of identity, purpose, and belonging.

Psychiatrists think inflammation may be at the root of some people’s illness. How to treat it is an open question.