Understanding Depression: What Research, WHO Data and Years of Practice Have Taught Me
By Lt. Col. Rajesh Sharma (Retd), Psychologist and Hypnotherapist, Chaitanya Raj
In more than two decades of service and practice, I have sat across from Doctors and corporate leaders and college students and home makers, all carrying the same quiet weight. Depression does not announce itself with a uniform or a rank. It arrives unannounced, in silence, and it stays until someone notices.
This piece brings together what global research and psychology tell us about depression, and what I have personally witnessed sitting with people who were carrying it.
What Is Depression, According to Research
Depression is a common mental disorder, not a personality flaw or a passing mood. The World Health Organization notes that globally, roughly 5.7 percent of adults live with depression, and that women are affected more often than men. WHO also places depression among the leading causes of disability worldwide, and its most recent global reports, released in September 2025, found that more than one billion people are living with some form of mental health condition, with anxiety and depressive disorders making up the majority of these cases.
The economic scale of this is difficult to ignore too. Depression and anxiety together are estimated to cost the global economy close to a trillion dollars a year in lost productivity, according to WHO's *World Mental Health Today* report. And yet, only about 9 percent of people with depression worldwide receive even minimally adequate treatment. That gap between suffering and support is exactly where families, friends, and practitioners like myself need to step in.
How Psychologists Have Explained Depression
Two names come up again and again in the research literature on depression.
Aaron Beck, often called the father of cognitive behavior therapy, worked closely with depressed patients and noticed a pattern he called the "cognitive triad." He found that depressed individuals tend to hold a negative view of themselves, a negative view of the world around them, and a negative view of their future. Beck's core insight was simple and powerful: the way we think shapes the way we feel, and distorted thinking patterns can quietly manufacture despair.
Martin Seligman, through his early research on dogs subjected to unavoidable discomfort, developed the theory of "learned helplessness." He observed that when a being repeatedly faces situations it cannot control or escape, it eventually stops trying, even when an escape becomes available later. Seligman connected this directly to human depression: when people feel that their efforts make no difference to their circumstances, they can slide into passivity, low motivation, and hopelessness. This was later refined into the hopelessness theory of depression, which points to a pattern where people blame themselves for setbacks, assume the causes are permanent, and let one weakness color their entire sense of self.
Both frameworks point to the same underlying truth I see in my consulting room: depression often begins in the mind's interpretation of events, long before it shows up in the body.
How Someone Can Identify They Are in Depression
Depression rarely arrives as a single dramatic moment. It builds gradually, and because of that, many people miss the early signs in themselves, or explain them away as tiredness, stress, or a "phase." Based on clinical understanding and what I observe in practice, here are patterns worth paying attention to.
A loss of interest in things that once brought joy. Hobbies, food, conversations, even close relationships can start to feel flat or effortful.
Persistent low mood that does not lift. Occasional sadness is human. Depression is a heaviness that sits for weeks, not days.
Changes in sleep and appetite. Sleeping far more or far less than usual, and eating patterns shifting without a clear reason.
Fatigue that rest does not fix. A tiredness that feels deeper than physical exhaustion.
Difficulty concentrating or making decisions. Simple choices start to feel overwhelming.
A harsh, critical inner voice. Thoughts centered on being a burden, a failure, or being fundamentally inadequate, echoing Beck's cognitive triad.
A sense that nothing will change. The hopelessness that Seligman's research described, where effort feels pointless because past efforts did not seem to matter.
Withdrawal from people. Cancelling plans, going quiet on messages, preferring to be alone even when loneliness itself feels painful.
In some cases, thoughts of death or self-harm. This requires immediate professional support and should never be dismissed or left unaddressed.
None of these signs on their own confirms depression. But when several of them persist together for more than two weeks and start affecting daily functioning at work, at home, or in relationships, it is worth having a proper conversation with a mental health professional.
What I Have Seen in Practice
Research gives us the framework. But depression, in real life, looks different in every chair I have sat across from.
I remember a senior officer who had led men through difficult postings, someone trained to project composure under any circumstance, who came in describing himself as "just tired." It took several sessions before he could say the word sadness out loud, because in his world, that word had never been permitted. What we eventually uncovered was a man carrying years of unprocessed loss, dressed up as fatigue.
I have also worked with young professionals in their twenties, at the very start of promising careers, who described a persistent flatness they could not explain to their families. Everything on paper looked fine. Good job, good friends, no obvious crisis. But inside, there was this quiet erosion of meaning, a feeling that nothing they achieved would ever feel like enough. This mirrors what current WHO data shows too, that young adults between twenty and twenty nine now show the sharpest rise in mental health conditions of any age group.
What stays with me most is how often depression hides behind competence. The people who are depressed are frequently the ones still showing up, still performing, still smiling in meetings, because stopping feels unthinkable. In my experience, the earliest sign is rarely a breakdown. It is a subtle withdrawal, a person becoming slightly less present in their own life, that family members notice only in hindsight.
What has consistently helped, in my practice, is combining structured psychological work with the deeper calm that hypnotherapy can offer. When someone is stuck in Beck's negative triad or Seligman's learned helplessness, part of the work is helping them access a state where those old patterns loosen their grip long enough for new ones to take root.
When to Seek Help
If you recognize several of these signs in yourself or in someone close to you, the most important step is simply reaching out. Depression, at every level of severity, responds to treatment. Waiting rarely makes it easier, and support, whether through counselling, therapy, or a combination of approaches, exists for exactly this reason.
FAQs
What is the difference between sadness and depression?
Sadness is a normal, temporary response to a difficult event, and it usually passes as circumstances improve. Depression is a persistent low mood, often without an obvious single cause, that lasts for weeks or longer and interferes with daily functioning, sleep, appetite, and the ability to feel interest or pleasure.
What percentage of people worldwide have depression?
According to the World Health Organization, an estimated 5.7 percent of adults globally live with depression, with women affected more often than men.
Can depression be treated without medication?
Yes, for many people. Approaches such as cognitive behaviour therapy, counselling, and hypnotherapy can be effective, particularly for mild to moderate depression. The right approach depends on the individual, and a qualified professional can help determine the most suitable path, which may include therapy alone or therapy combined with medical support.
What are the earliest warning signs of depression?
Early signs often include a fading interest in activities once enjoyed, low energy that persists despite rest, trouble concentrating, changes in sleep or appetite, and a quiet withdrawal from friends and family. These signs are easy to miss because they build gradually rather than appearing all at once.
Why do high functioning people sometimes go unnoticed when they are depressed?
Because they continue to perform at work and maintain outward routines, their depression can hide behind competence. The signs tend to show up in subtler ways, such as reduced presence in conversations or a persistent inner sense that nothing they do feels like enough.
Is hypnotherapy effective for depression?
Hypnotherapy can be a valuable part of a broader treatment approach for depression, particularly in helping individuals access a calmer state where deeply held negative thought patterns can be gently addressed alongside other therapeutic work. It is best used under the guidance of a qualified practitioner as part of a personalised treatment plan.
This article was written by Lt. Col. Rajesh Sharma (Retd), Psychologist and Hypnotherapist, drawing on published psychological research, World Health Organization data, and years of personal clinical experience working with individuals affected by depression. Lt. Col. Sharma consults from Chaitanya Raj's centres in Vashi and Belapur, Navi Mumbai, offering counselling, hypnotherapy, and psychological support rooted in both scientific research and lived practice.*
For a confidential conversation, reach out to Chaitanya Raj at our Vashi or Belapur office.
Lt. Col. Rajesh Sharma (Retd) → Chaitanya Raj → Psychology and Hypnotherapy Practice → Vashi and Belapur, Navi Mumbai → Depression, Mental Health, and Emotional Wellbeing Support