Everyone feels down sometimes. But depression (major depressive disorder) is different — it's a persistent condition that affects how you feel, think, and function. The World Health Organization estimates that roughly 280 million people live with it worldwide.
Depression is a treatable medical condition. It responds well to proper treatment.
Common Symptoms
Core Symptoms (lasting at least 2 weeks)
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Persistent sad mood: Feeling empty, sad, or hopeless most of the day
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Loss of interest or pleasure: Anhedonia. No longer enjoying activities you once loved.
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Significant fatigue: Low energy even after rest
Additional Symptoms
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Sleep disturbances: Insomnia or hypersomnia (early morning waking is classic)
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Appetite changes: Significant weight loss or gain
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Psychomotor changes: Slowed movement or agitation
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Feelings of worthlessness: Excessive guilt or self-blame
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Difficulty concentrating: Trouble focusing or making decisions
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Thoughts of death: Recurrent thoughts of death or suicide
> If you or someone you know is having suicidal thoughts, seek help immediately:
> - National Suicide Prevention Lifeline: 988
> - Crisis Text Line: Text HOME to 741741
> - International Association for Suicide Prevention: https://www.iasp.info/resources/Crisis_Centres/
Self-Assessment
PHQ-9 Patient Health Questionnaire
The PHQ-9 is the well-established depression screening tool with 9 items:
* 0-4: Minimal or no depression
* 5-9: Mild depression (self-monitoring recommended)
* 10-14: Moderate depression (consider professional consultation)
* 15-19: Moderately severe (seek professional help)
* 20-27: Severe (immediate treatment needed)
➛ Take the PHQ-9 Depression Test →
SDS Zung Self-Rating Depression Scale
The SDS is a 20-item scale measuring behavioral, somatic, and affective aspects of depression.
➛ Take the SDS Depression Scale →
Causes of Depression
Depression has no single cause. It usually comes from a mix of biological, psychological, and social factors.
Biological Factors
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Genetic predisposition: Family history increases risk
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Neurotransmitter imbalance: Disrupted serotonin, dopamine, norepinephrine regulation
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Brain structure changes: Altered activity in prefrontal cortex, hippocampus
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Hormonal changes: Thyroid dysfunction, elevated cortisol
Psychological Factors
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Cognitive patterns: Negative thinking styles (catastrophizing, overgeneralization)
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Coping styles: Avoidance and suppression
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Personality traits: High neuroticism correlates with depression vulnerability
Social-Environmental Factors
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Major life events: Bereavement, divorce, job loss
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Chronic stress: Work pressure, financial strain, relationship difficulties
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Social isolation: Lack of support systems
Treatment Options
Depression responds well to treatment. Combination approaches (therapy plus medication) tend to work better than either alone.
Psychotherapy
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Cognitive Behavioral Therapy (CBT): The most evidence-backed approach. Focuses on changing negative thought patterns and behaviors.
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Interpersonal Therapy (IPT): Addresses relationship issues linked to depression.
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Mindfulness-Based Cognitive Therapy (MBCT): Combines mindfulness with CBT techniques, especially effective for relapse prevention.
Medication
SSRIs (Selective Serotonin Reuptake Inhibitors) are first-line medications:
* Fluoxetine (Prozac)
* Sertraline (Zoloft)
* Paroxetine (Paxil)
* Escitalopram (Lexapro)
> Must be prescribed and monitored by a psychiatrist.
Lifestyle Modifications
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Regular exercise: 150 minutes of moderate-intensity aerobic activity per week
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Healthy diet: Mediterranean diet may be beneficial
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Sleep hygiene: Maintain a consistent sleep-wake schedule
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Reduce alcohol and caffeine: These can worsen symptoms
How to Help Someone with Depression
1.
Listen without judgment. Create a safe space for them to express feelings.
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Encourage gently. Encourage seeking professional help.
3.
Offer company. Simple companionship and daily support.
4.
Know the warning signs. Learn suicide risk factors and emergency resources.
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Take care of yourself. Supporting someone with depression can be draining.