A doctor asks how long it has been going on and you sit there doing arithmetic. Not weeks. You think back past this job to the one before it, and somewhere around a year you have not thought about in ages you give up looking for the edge of it. What you say out loud is "a while, I guess." What you were actually doing was trying to remember a stretch that felt different, and failing.
Persistent depressive disorder is the name for low mood that has been running long enough to stop looking like a symptom. It does not arrive. It is just there, the way the weather is there, and the people who have it tend to describe themselves as realistic, or low maintenance, or a bit of a pessimist, rather than as unwell. This is a map of where it lands: your body, your thinking, the things you stopped doing, and your closest relationships. Reading yourself into it is not the same as being diagnosed with it.
The mood you assumed was your personality
Dysthymia is the older word for it. The current manual folded that term into the single label persistent depressive disorder, which is why you will see both names used for what is broadly the same picture.
The defining feature is not severity. It is duration. Major depression tends to have edges. This does not. Clinicians look for low mood that has run for years rather than weeks. That duration is also why it hides. Anything that has been true for a decade stops being information. Most people who end up reading about chronic low-grade depression are not in crisis. They are functioning, employed, showing up, and quietly exhausted by how much showing up costs them. MedlinePlus covers persistent depressive disorder in plain terms, and NIMH tracks how common it is.
Where it shows up in your body, year after year
The physical side of this is unremarkable on any given day, which is exactly the problem. There is nothing here that would make a person phone someone in a panic. There is a great deal that adds up over a decade.
Tiredness is the constant. Not the tiredness of a bad night. A background heaviness that a holiday improves for about four days. Sleep goes one of two ways: either you are in bed for nine hours and wake up unrefreshed, or you have been a poor sleeper for so long that you have stopped counting it as a symptom. Appetite drifts. Then the low-grade physical noise: tension headaches, shoulders up near your ears, a stomach that reacts to everything. What is missing is often more telling than what is present. There is no crash. Nothing dramatic ever happens, which is precisely why nobody has ever asked you about it.
Nobody needs a diagnosis to book with us, and a description of an ordinary week is plenty to start from. A free 15-minute consultation is quick, unpaid, and commits you to nothing at all.
In how you think about the future
The thinking is where this does the most damage, and it is almost invisible from the inside because it does not present as sadness. It presents as accuracy.
The forecast is flat. Simply featureless. Asked where you would like to be in three years, you find you have no answer, and the absence feels like maturity rather than like a symptom. Good things get discounted in real time. A promotion lands and within an hour it has been reclassified as a fluke. Compliments are processed as politeness. Self-criticism has the same quality. Most people with chronic low mood experience their inner commentary as a fair assessment rather than as cruelty. And there is a particular relationship with effort: you calibrate downward, and over years that calibration becomes the size of your life.
Can you be depressed for years without knowing?
Yes, and it is the standard way this goes rather than an unusual one. Two things make it possible. The first is that there is no contrast, so nothing signals a change. The second is that most public descriptions of depression are descriptions of a severe episode, so a person who is working and parenting reasonably assumes they cannot have it. APA's overview of depression and CAMH's depression page both note how presentations vary widely.
In what you quietly stopped doing
The narrowing happens so slowly it never produces a decision you could point to. There was a year you played five-a-side. There was a period when you cooked properly on Sundays. You used to read novels, and now you read four pages and pick up your phone. Not one of those stopped on a particular day. Each one just got harder to justify than it was worth.
Socially it looks like maintenance rather than withdrawal. You answer messages, eventually. What has gone is initiating. Work follows the same pattern. Ambition gets revised downward quietly, one declined opportunity at a time. Ten years of individually reasonable decisions produce a career that looks like a choice and never was one. The useful test is whether you can describe a good week. When the best available description is one where nothing went wrong, that is worth taking seriously.
In your closest relationships
From the inside, you are being easy to live with. Undemanding. Not making a fuss. From the outside it can read as absence. Partners of people with long-term low mood often describe a person who is entirely reliable and slightly unreachable, present at the table and not quite in the room.
Friendships thin by attrition rather than argument. You are the one who does not suggest things. Over ten years, the invitations from the people who used to suggest things also stop. Irritability belongs in here too. Running at capacity for years leaves no reserve for ordinary friction, so the reaction to a small domestic annoyance can be out of scale, followed by shame that lasts far longer than the flare.
What it is not
It is not your personality. This is the hardest one to accept, and the most important. Traits are stable across contexts and across decades, and they do not respond to treatment. If you can find years, even a stretch of eight or nine months, that felt genuinely different, then you are looking at a state rather than a trait.
It is not laziness. The effort involved in an ordinary Tuesday is considerably higher than it is for the people around them. It is not introversion. Introverts refill their tank in solitude; this does not. It is not a milder illness that matters less than major depression. Longer is not gentler. And it is not something you have to earn help for by deteriorating first.
How is dysthymia different from depression?
The difference is shape over time, not how bad it feels at the worst moment. Major depression is episodic. It comes, it is severe, it interferes obviously, and for many people it eventually lifts. Persistent depressive disorder is a lowered baseline that stays put. The two also combine. A person living on a low baseline can have a full episode of major depression land on top of it, which clinicians sometimes describe as double depression. From the inside, that is often the moment people finally seek help, because for once there is a contrast. Our depression counselling page covers how we work with both patterns, and anxiety and depression together is useful when both are present. Psychiatry.org also walks through common forms of depression.
Can long-term low mood still be treated?
Duration does not make something untreatable, and the goals change when a low mood has been the baseline for a long time. With an episode, the target is usually a return to how somebody was before. Here there may be no before to return to, so the work is more often about building something a person has not had: sleep, activity that actually returns something, the self-criticism examined properly, and one relationship at a time.
With a long baseline, the early gains usually show up in energy and in what a week contains, not in how you feel about yourself. The outlook is generally the last thing to shift. People who expect the feeling to change first often conclude nothing is working, three weeks before it starts to. WHO's depression fact sheet is a clear public overview of how common depression is and why treatment matters.
At our practice, psychologists and Nurse Practitioners can assess and diagnose. Our Nurse Practitioners, who see clients in Kitchener, Waterloo and Cambridge, can also prescribe medication when it's needed. Our Registered Psychotherapists and Registered Social Workers provide therapy. You don't need a diagnosis to start therapy.
One thing does need saying plainly. Low mood that has run for years carries risk, even when it has never once felt like a crisis. Our practice can't offer crisis support. Call or text 9-8-8 any time. In Waterloo Region, call Here 24/7 at 1-844-437-3247. In Ottawa, call the Mental Health Crisis Line at 613-722-6914. If you're in immediate danger, call 911 or go to the nearest emergency department.
Taking the first step
You won't need a referral, and we don't have a waitlist. We've been part of Kitchener-Waterloo since 2016, and we see people in person in Waterloo, Kitchener, Cambridge and Ottawa, or online anywhere in Ontario. Sessions with our therapists are $130 to $200, and there is a one-time $50 setup fee. Sessions with our student therapists are $0 to $80. Many extended health plans cover counselling, and in many cases we can bill your insurance directly, depending on your plan and your therapist. Depending on your plan, your insurance may cover the full session fee.
The first conversation costs nothing and settles nothing. Take a free 15-minute consultation, say that you have felt like this for as long as you can remember, and see what comes back.