Depression (major depressive disorder or clinical depression) is one of the most common disorders. It causes severe symptoms that affect how you feel, think, and act. Symptoms can include persistent sad mood, feelings of hopelessness, irritability, feelings of guilt, loss of interest, decreased energy, difficulties with concentration, sleeping, or eating. It can also include thoughts of suicide and aches and pains that seem to have no physical reason.
Depression can happen at any age, but most often begins in adulthood. It is believed that depression can be caused by a variety of genetic, biological, environmental, and psychological factors.
Linked below you will find several self-assessment quizzes on depression. These quizzes may help distinguish if you suffer from depression, however they are not for an official diagnosis. These are a starting point for you to help discuss depression with your health professional.