Overview#
Depression (Major Depressive Disorder) is a serious mental health condition characterised by persistent low mood, loss of interest or pleasure in daily activities, and a range of emotional and physical symptoms lasting at least 2 weeks. According to the WHO, India accounts for nearly 18 % of the global depression burden, with an estimated 56 million people affected. Despite this, less than 10 % receive adequate treatment due to stigma, lack of mental health professionals (only 0.3 psychiatrists per 100,000 population), and the misconception that depression is a sign of weakness rather than a medical illness.
Causes & Risk Factors#
- Neurobiological factors – imbalance of neurotransmitters (serotonin, norepinephrine, dopamine), structural brain changes in the prefrontal cortex and hippocampus.
- Genetic predisposition – first-degree relatives of depressed individuals have 2-3 times higher risk; heritability is estimated at 40 %.
- Psychosocial stressors – financial stress, relationship problems, academic pressure, bereavement, domestic violence, and social isolation.
- Chronic medical illness – diabetes, hypothyroidism, cancer, chronic pain, and heart disease frequently co-occur with depression.
- Indian cultural context – stigma around mental illness, family pressure, gender inequality, and caregiving burden (especially on women) contribute significantly.
Signs & Symptoms#
- Persistent sadness, emptiness, or hopelessness lasting most of the day, nearly every day
- Loss of interest or pleasure in activities previously enjoyed (anhedonia)
- Significant weight change (loss or gain) or appetite changes
- Insomnia or hypersomnia (sleeping too much)
- Fatigue and loss of energy – even simple tasks feel exhausting
- Difficulty concentrating, making decisions, or remembering
- Feelings of worthlessness or excessive guilt
- Recurrent thoughts of death or suicide, or suicide attempts
In India, depression often presents with somatic (physical) symptoms: headaches, body aches, digestive complaints, and "tension" – making it commonly misdiagnosed as a physical illness.
Diagnosis#
Depression is diagnosed clinically using standardised criteria:
- DSM-5 Criteria – 5 or more symptoms present for at least 2 weeks, including either depressed mood or loss of interest, causing significant functional impairment.
- Screening tools: PHQ-9 (Patient Health Questionnaire) is widely used – scores ≥ 10 suggest moderate depression requiring treatment.
- Blood tests to rule out medical causes:
- Thyroid Profile – hypothyroidism mimics depression
- Vitamin B12 – deficiency can cause mood changes
- Vitamin D – low levels are associated with depression
- CBC – anemia can cause fatigue and low mood
- HbA1c – diabetes and depression commonly co-exist
Treatment Options#
Psychotherapy (talk therapy):
- Cognitive Behavioural Therapy (CBT) – the most evidence-based psychotherapy; helps identify and change negative thought patterns. Effective for mild-moderate depression.
- Interpersonal Therapy (IPT) – focuses on improving relationships and communication.
- Online therapy platforms have made mental health support more accessible in India.
Antidepressant medications (for moderate-severe depression):
- SSRIs – escitalopram, sertraline, fluoxetine – first-line; well-tolerated with fewer side effects.
- SNRIs – venlafaxine, duloxetine – useful when depression co-exists with chronic pain.
- Atypical antidepressants – mirtazapine (helpful for insomnia and poor appetite), bupropion (activating, helps with fatigue).
- Antidepressants typically take 2-4 weeks to show full effect. Do not stop abruptly – taper under medical supervision.
Combination therapy (medication + psychotherapy) is the most effective approach for moderate-severe depression.
Lifestyle measures:
- Regular exercise (30 minutes, 5 days/week) – shown to be as effective as mild antidepressants for mild-moderate depression.
- Maintain regular sleep schedule (7-8 hours), social connections, and daily routine.
- Yoga and meditation (supported by NIMHANS research) as adjunctive treatments.
Prevention#
- Build and maintain strong social connections – isolation is a major risk factor.
- Learn stress management skills – mindfulness, deep breathing, and journaling.
- Seek help early – do not wait until symptoms are severe.
- If you have chronic illness (diabetes, thyroid, heart disease), screen for depression regularly.
- Reduce alcohol intake – it is a depressant that worsens mood over time.
When to See a Doctor#
Consult a psychiatrist or psychologist if your low mood persists for more than 2 weeks, if you have lost interest in daily activities, or if depression is affecting your work, relationships, or self-care. Seek immediate help if you have thoughts of self-harm or suicide – call iCALL (9152987821) or Vandrevala Foundation Helpline (1860-2662-345). Depression is a treatable medical condition – recovery is possible with the right support.