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Understanding Depression: Symptoms, Causes and Treatment

Dr. Sidharth Sood January 15, 2026 8 min read
Understanding Depression: Symptoms, Causes and Treatment

What is Depression?

Depression, or Major Depressive Disorder (MDD), is a common mental health condition characterized by persistent feelings of sadness, emptiness, and loss of interest in daily activities. It’s not simply feeling sad—it’s a medical condition that affects how you feel, think, and function.

Symptoms of Depression

Emotional Symptoms

  • Persistent sadness or empty mood
  • Loss of interest in activities you once enjoyed
  • Feelings of worthlessness or excessive guilt
  • Difficulty making decisions
  • Thoughts of death or suicide

Physical Symptoms

  • Changes in sleep patterns (insomnia or oversleeping)
  • Fatigue or loss of energy
  • Changes in appetite or weight
  • Physical aches and pains
  • Restlessness or slowed movements

Cognitive Symptoms

  • Difficulty concentrating or focusing
  • Reduced ability to make decisions
  • Negative thought patterns
  • Memory problems

Causes of Depression

Depression results from a combination of factors:

  1. Biological Factors - Imbalances in brain chemicals (neurotransmitters like serotonin, dopamine, and norepinephrine)
  2. Genetic Factors - Family history of depression increases risk
  3. Environmental Stressors - Major life events, trauma, or chronic stress
  4. Medical Conditions - Thyroid issues, hormonal changes, chronic pain
  5. Lifestyle Factors - Poor sleep, lack of exercise, substance use

Treatment Options

Psychotherapy (Counseling)

  • Cognitive Behavioral Therapy (CBT) - Helps identify and change negative thought patterns
  • Interpersonal Therapy (IPT) - Focuses on improving relationships and social functioning
  • Psychodynamic Therapy - Explores underlying emotional patterns

Medication

  • SSRIs (Selective Serotonin Reuptake Inhibitors) - First-line antidepressants
  • SNRIs (Serotonin-Norepinephrine Reuptake Inhibitors)
  • Other antidepressants - Prescribed based on individual needs

Lifestyle Modifications

  • Regular physical exercise
  • Adequate sleep and healthy sleep hygiene
  • Balanced nutrition
  • Stress management techniques
  • Social connection and support

Advanced Treatments

  • Transcranial Magnetic Stimulation (TMS) - For treatment-resistant depression
  • Electroconvulsive Therapy (ECT) - For severe cases

When to Seek Help

If you experience the following, it’s time to consult a psychiatrist:

  • Symptoms persist for more than 2 weeks
  • Symptoms interfere with daily functioning
  • You have thoughts of self-harm
  • Symptoms are affecting relationships or work

Recovery is Possible

With proper treatment and support, most people with depression recover and go on to lead fulfilling lives. The key is reaching out for help early.


Ready to take the first step? Contact Dr. Sidharth Sood for a comprehensive evaluation and personalized treatment plan. Your mental health matters.

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Dr. Sidharth Sood

Psychiatrist & Addiction Specialist
MBBS | MD Psychiatry | DM Addiction Psychiatry (AIIMS)

Dr. Sidharth Sood is a Neuropsychiatrist and Addiction Psychiatry Specialist based in New Delhi. With training from AIIMS and expertise in neuromodulation therapies, he provides evidence-based psychiatric care for depression, anxiety, addiction, and other mental health conditions. Committed to compassionate, personalized care and patient education.

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