Why have I been depressed for years?

Long-duration depression usually persists because something has been maintaining it: a situation that never changed, an underlying condition such as adult ADHD or complex trauma that was never identified, a physical cause such as thyroid problems or deficiency, or the self-sustaining loop in which low energy reduces activity and reduced activity lowers mood further. Treatment aimed only at the symptom tends to produce partial results.

Can depression that has lasted years still be treated?

Yes. Long-duration depression responds to treatment, though it often takes longer than a recent episode and needs the right target rather than simply more effort. Duration is not the same as permanence. The usual reason people stay stuck is that what was maintaining the depression was never identified.

Why does therapy or medication not seem to work for me?

Often the process stopped partway — a dose never adjusted, a medication never reviewed, or therapy that ended before it reached the maintaining factor. It can also mean the target was wrong: where ADHD, trauma, or an unchanged situation sits underneath, treating the low mood alone tends to give partial results that do not hold.

I function normally — can I still be depressed?

Yes. Many people with long-term low mood work, raise families, and meet every obligation, which is exactly why it goes unrecognised. Functioning is not evidence that nothing is wrong, and you do not have to be unable to cope before it is worth addressing.

Why Have I Been Depressed for So Long?

Depression that has lasted years is not a personal failure. The reasons long-term low mood persists — and what actually changes it.

Bhatta Psychotherapy7 min readPublished 1 September 2026

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Share only if you are comfortable — general information, not personal medical advice.

Articles in English and Nepali — नेपालीमा पढ्नुहोस्

Some people can date their depression to something that happened. Others cannot remember when it started, or whether there was a version of themselves before it. When low mood has been present for years, it stops feeling like an illness and starts feeling like a personality — this is simply how I am.

That conclusion is usually wrong, and it is the reason many people never seek help. Long-duration depression is not evidence that you are beyond help. It usually means something specific has been maintaining it.

Long-term low mood has a name

Depression that runs for years at a lower intensity — not incapacitating, but never lifting — is a recognised pattern rather than a character trait. Clinicians sometimes call it persistent depressive disorder or dysthymia.

Because it is less dramatic than a severe episode, it is often missed entirely. People function: they work, raise children, meet obligations. Nobody around them sees a problem, and they conclude they have no right to call it one. Meanwhile years pass at seventy percent.

Why it persists

Several things keep long-term depression in place, and more than one is usually operating at once.

The situation never changed

This is the most common reason and the most overlooked. If you are in a marriage that has been unhappy for a decade, work that has become meaningless, or a family arrangement where your own life has never quite been your own, then low mood is not a malfunction. It is a reasonable response to circumstances that have not shifted.

Treating the mood while leaving the situation untouched tends to produce exactly what many people describe: it helped me cope, but nothing actually changed.

Something underneath was never identified

Long-term low mood is often secondary to something that was never named:

Adult ADHD — years of underperforming against your own expectations produces a very convincing depression
Complex trauma from childhood or a long-running situation, where low mood is one part of a wider picture
Grief that was never given room, particularly where the loss was ambiguous — a migration, an estrangement, a life that did not happen
Thyroid problems, anaemia, B12 or vitamin D deficiency, or sleep apnoea

Where one of these sits underneath, treating the depression alone tends to produce partial results that never quite hold.

Also read: The connection between ADHD and depression →

Depression maintains itself

Once established, depression is self-sustaining in a way that has nothing to do with willpower. It reduces energy, so you do less; doing less removes the sources of satisfaction that would lift mood; lower mood reduces energy further. Withdrawal from people follows the same loop.

The loop is why advice to simply do more rarely works, and why being told to think positively can feel insulting. The mechanism is not a shortage of good intentions.

Treatment stopped partway

Many people have one course of medication that did not obviously help, or a handful of therapy sessions years ago, and reasonably concluded that treatment does not work for them. Often what happened is that the process stopped before it was finished — a dose never adjusted, a medication never reviewed, therapy ended before it reached anything.

Also read: Why isn't my medication working? →

In the Nepali context

A few things specifically prolong this here. Distress often presents physically first, so people spend years in medical investigation for headaches, gastric trouble, or fatigue before anyone considers depression.

There is also a widely held belief that low mood is weakness, or a lack of gratitude, or something to be managed privately within the family. And where obligation to family reasonably comes before individual preference, a life can be built entirely around duty in a way nobody would call depression — but which leaves very little room for the person living it.

For those abroad, isolation and years of postponed decisions do something similar. Life becomes a holding pattern, and holding patterns are quietly depressing.

Why this is more hopeful than it sounds

Long-duration depression responds to treatment. It often takes longer than a recent episode, and it usually needs the right target rather than simply more effort — but duration is not the same as permanence.

The most common reason people stay stuck for years is not that their depression is untreatable. It is that what was maintaining it was never identified, so treatment kept aiming at the symptom.

What actually helps

Working out what has been maintaining it, rather than treating the mood alone
Ruling out physical causes with a doctor if that has never been done
Considering whether ADHD, trauma, or unprocessed grief sits underneath
Addressing the situation where the situation is the problem — which may mean changing something, or grieving that it cannot be changed
Behavioural activation — re-establishing activity in a structured way, working with the loop rather than against it
Medication reviewed properly rather than abandoned after one attempt

A note on how long you have waited

People who have felt this way for years often apologise for not coming sooner. It is worth saying that the delay makes complete sense: when something has been present long enough, it stops looking like a condition and starts looking like the weather.

Noticing that it might be something else, and something addressable, is the part that actually matters.

Frequently asked questions

Why have I been depressed for years?: Long-duration depression usually persists because something has been maintaining it: a situation that never changed, an underlying condition such as adult ADHD or complex trauma that was never identified, a physical cause such as thyroid problems or deficiency, or the self-sustaining loop in which low energy reduces activity and reduced activity lowers mood further. Treatment aimed only at the symptom tends to produce partial results.
Is long-term depression the same as normal depression?: Depression running for years at a lower intensity is a recognised pattern, sometimes called persistent depressive disorder or dysthymia. Because it is less dramatic than a severe episode and people continue functioning, it is often missed entirely — including by the person experiencing it.
Can depression that has lasted years still be treated?: Yes. Long-duration depression responds to treatment, though it often takes longer than a recent episode and needs the right target rather than simply more effort. Duration is not the same as permanence. The usual reason people stay stuck is that what was maintaining the depression was never identified.
Why does therapy or medication not seem to work for me?: Often the process stopped partway — a dose never adjusted, a medication never reviewed, or therapy that ended before it reached the maintaining factor. It can also mean the target was wrong: where ADHD, trauma, or an unchanged situation sits underneath, treating the low mood alone tends to give partial results that do not hold.
I function normally — can I still be depressed?: Yes. Many people with long-term low mood work, raise families, and meet every obligation, which is exactly why it goes unrecognised. Functioning is not evidence that nothing is wrong, and you do not have to be unable to cope before it is worth addressing.