Depression is a Real Illness

10/22/20 ·National Institute of Mental Health

I’m a firefighter and ex-Marine. I should be able to deal with anything. But I was sleeping poorly and always in a bad mood. My work was suffering because I couldn’t concentrate. I felt like I was just going through the motions and wondering what the point of it all was. I never considered that I might have an underlying condition. I figured this is just how life is.

Sadness is something we all experience. It is a normal reaction to difficult times in life and usually passes with a little time.

When a person has depression, it interferes with daily life and normal functioning. It can cause pain for both the person with depression and those who care about him or her. Doctors call this condition “depressive disorder,” or “clinical depression.” It is a real illness. It is not a sign of a person’s weakness or a character flaw. You can’t “snap out of” clinical depression. Most people who experience depression need treatment to get better.

Signs and Symptom

Sadness is only a small part of depression. Some people with depression may not feel sadness at all. Depression has many other symptoms, including physical ones. If you have been experiencing any of the following signs and symptoms for at least 2 weeks, you may be suffering from depression:

  • Persistent sad, anxious, or “empty” mood
  • Feelings of hopelessness, pessimism
  • Feelings of guilt, worthlessness, helplessness
  • Loss of interest or pleasure in hobbies and activities
  • Decreased energy, fatigue, being “slowed down”
  • Difficulty concentrating, remembering, making decisions
  • Difficulty sleeping, early-morning awakening, or oversleeping
  • Appetite and/or weight changes
  • Thoughts of death or suicide, suicide attempts
  • Restlessness, irritability
  • Persistent physical symptoms

Factors That Play a Role in Depression

Many factors may play a role in depression, including genetics, brain biology and chemistry, and life events such as trauma, loss of a loved one, a difficult relationship, an early childhood experience, or any stressful situation.

Depression can happen at any age, but often begins in the teens or early 20s or 30s. Most chronic mood and anxiety disorders in adults begin as high levels of anxiety in children. In fact, high levels of anxiety as a child could mean a higher risk of depression as an adult.

Depression can co-occur with other serious medical illnesses such as diabetes, cancer, heart disease, and Parkinson’s disease. Depression can make these conditions worse and vice versa. Sometimes medications taken for these illnesses may cause side effects that contribute to depression. A doctor experienced in treating these complicated illnesses can help work out the best treatment strategy.

Research on depression is ongoing, and one day these discoveries may lead to better diagnosis and treatment. To learn more about current research, visit the NIMH website at www.nimh.nih.gov.