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)
- Persistent sad mood: Feeling empty, sad, or hopeless most of the day
- Loss of interest or pleasure: Anhedonia. No longer enjoying activities you once loved.
- Significant fatigue: Low energy even after rest
Additional Symptoms
- Sleep disturbances: Insomnia or hypersomnia (early morning waking is classic)
- Appetite changes: Significant weight loss or gain
- Psychomotor changes: Slowed movement or agitation
- Feelings of worthlessness: Excessive guilt or self-blame
- Difficulty concentrating: Trouble focusing or making decisions
- 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)
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
- Genetic predisposition: Family history increases risk
- Neurotransmitter imbalance: Disrupted serotonin, dopamine, norepinephrine regulation
- Brain structure changes: Altered activity in prefrontal cortex, hippocampus
- Hormonal changes: Thyroid dysfunction, elevated cortisol
Psychological Factors
- Cognitive patterns: Negative thinking styles (catastrophizing, overgeneralization)
- Coping styles: Avoidance and suppression
- Personality traits: High neuroticism correlates with depression vulnerability
Social-Environmental Factors
- Major life events: Bereavement, divorce, job loss
- Chronic stress: Work pressure, financial strain, relationship difficulties
- 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
- Cognitive Behavioral Therapy (CBT): The most evidence-backed approach. Focuses on changing negative thought patterns and behaviors.
- Interpersonal Therapy (IPT): Addresses relationship issues linked to depression.
- 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
- Regular exercise: 150 minutes of moderate-intensity aerobic activity per week
- Healthy diet: Mediterranean diet may be beneficial
- Sleep hygiene: Maintain a consistent sleep-wake schedule
- Reduce alcohol and caffeine: These can worsen symptoms
How to Help Someone with Depression
- Listen without judgment. Create a safe space for them to express feelings.
- Encourage gently. Encourage seeking professional help.
- Offer company. Simple companionship and daily support.
- Know the warning signs. Learn suicide risk factors and emergency resources.
- Take care of yourself. Supporting someone with depression can be draining.