Major Depressive Disorder
Major depressive disorder is a common but serious mood disorder that causes a persistent feeling of sadness and loss of interest in activities. It affects how you feel, think, and handle daily activities such as sleeping, eating, or working.
Overview
Major depressive disorder is a common but serious mood disorder that causes a persistent feeling of sadness and loss of interest in activities. It affects how you feel, think, and handle daily activities such as sleeping, eating, or working.
Symptoms
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Causes
- •Imbalance of brain neurotransmitters
- •Genetic predisposition
- •Major life stress or trauma
- •Chronic medical conditions
Risk factors
- •Family history of depression
- •History of other mental health disorders
- •Significant life changes or trauma
- •Low self-esteem or pessimistic personality
How it progresses
3 stages- Stage 1 — EarlyMild or intermittent symptoms; easily mistaken for something minor.Often missed
- Stage 2 — ProgressiveSymptoms become more frequent or severe.
- Stage 3 — EstablishedDaily life affected; medical care strongly recommended.
How it's diagnosed
- •Patient history and symptom review
- •DSM-5 clinical criteria assessment
- •Physical exam to rule out other causes
- •Blood tests to check thyroid or vitamins
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Psychotherapy such as CBT or IPT
- •Antidepressant medications
- •Lifestyle modifications
- •Brain stimulation therapies for severe cases
- •Maintaining a regular sleep schedule
- •Daily physical activity and exercise
- •Avoiding alcohol and recreational drugs
- •Structured journaling or mindfulness
Complications
- •Long-term damage if untreated
- •Reduced quality of life
- •Worsening symptoms over time
- •Recurrence of major depressive disorder
Prevention
- •Maintain a healthy lifestyle
- •See a clinician for routine check-ups
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to major depressive disorder
- Thoughts of self-harm or suicide
- Inability to care for basic needs
- Severe withdrawal from all social contact
- Psychosis or loss of touch with reality
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Major Depressive Disorder cause headaches?
- ›Is Major Depressive Disorder reversible?
- ›How quickly does Major Depressive Disorder progress?
- ›Is Major Depressive Disorder hereditary?
- ›Can Major Depressive Disorder be prevented?
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Frequently asked questions
Possible causes of Major Depressive Disorder include Imbalance of brain neurotransmitters, Genetic predisposition, Major life stress or trauma, Chronic medical conditions.
Major Depressive Disorder can be serious and may require prompt medical attention, especially if symptoms are severe or worsening.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Major Depressive Disorder typically benefits from medical evaluation and should not be ignored.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026