Depression: Symptoms, Causes, and Evidence-Based Treatment

Depression is more than just feeling sad or going through a rough patch. It is a serious mental health condition that requires understanding, clinical validation, and proper care. While sadness is a normal human emotion that everyone experiences, depression is a persistent state that affects how you feel, think, and handle daily activities, such as sleeping, eating, or working.

What is Depression (Major Depressive Disorder)?

Major Depressive Disorder (MDD), commonly known as depression, is a mood disorder that causes a persistent feeling of sadness and loss of interest. It affects how you feel, think, and behave and can lead to a variety of emotional and physical problems. You may have trouble doing normal day-to-day activities, and sometimes you may feel as if life isn't worth living.

Key Signs and Symptoms

The symptoms of depression can vary from mild to severe and can include:

1. Persistent sadness or an "empty" mood.
2. Loss of interest or pleasure in activities once enjoyed.
3. Changes in appetite, weight loss or gain unrelated to dieting.
4. Trouble sleeping or sleeping too much.
5. Loss of energy or increased fatigue.
6. Increase in purposeless physical activity (e.g., inability to sit still, pacing, handwringing) or slowed movements or speech (these actions must be severe enough to be observable by others).
7. Feeling worthless or guilty.
8. Difficulty thinking, concentrating, or making decisions.
9. Thoughts of death or suicide.

Evidence-Based Treatment Options

Depression is among the most treatable of mental disorders. Between 80% and 90% of people with depression eventually respond well to treatment. Almost all patients gain some relief from their symptoms.

1. Psychotherapy

Psychotherapy, or "talk therapy," is sometimes used alone for treatment of mild depression; for moderate to severe depression, psychotherapy is often used along with antidepressant medications. Cognitive Behavioral Therapy (CBT) has been found to be effective in treating depression. CBT helps a person recognize distorted or negative thinking with the goal of changing thoughts and behaviors to respond to challenges in a more positive manner.

2. Medication

Brain chemistry may contribute to an individual’s depression and may factor into their treatment. Antidepressants may be prescribed to help modify one’s brain chemistry. These medications are not sedatives, "uppers" or tranquilizers. They are not habit-forming.

3. Self-Help and Coping

There are a number of things people can do to help reduce the symptoms of depression. For many people, regular exercise helps create positive feeling and improves mood. Getting enough quality sleep on a regular basis, eating a healthy diet and avoiding alcohol can also help reduce symptoms of depression.

References

[1]: American Psychiatric Association. (2020). What Is Depression? [2]: National Institute of Mental Health. (2024). Depression.