By recognizing the different symptoms of depression , you can take the first steps to feeling better and overcoming the problem. Depression symptoms and warning signs Depression varies from person to person, but there are some common signs and symptoms . It’s important to remember that these symptoms can be part of life’s normal lows. WHO fact sheet on depression , providing information on prevalence, symptoms , prevention and contributing factors, diagnosis and treatment, and WHO's work in the area. Read about the symptoms of depression in adults, which can be mild, moderate or severe. Symptoms can also be classed as psychological, physical and social. What is depression ? Depression is a mental health disorder that affects a person's mood and feelings of self-worth. Symptoms of depression can range from mild to severe. The most severe type of depression is called major depression . A combination of genetic, biological, environmental, and psychological factors are believed to play a role in ...