Prolonged Grief Disorder: When Grief Becomes a Diagnosis

It’s been fourteen months. Everyone else has moved through whatever they were moving through, and the messages checking on you stopped somewhere around month four. You went back to work. You are, by any external measure, carrying on.

What nobody can see is that you still think about her most of the day, that you’ve kept the room as it was, and that a voicemail you can’t delete is the only thing you listen to on the drive home. Someone gently used the phrase complicated grief last week and you’ve been looking it up ever since, trying to work out whether it means you’re grieving wrong.

It doesn’t. But there is a real clinical concept underneath the phrase, and the honest version of it is more interesting than the leaflets suggest.

It has had at least five names

Start here, because the naming history tells you something important about how settled this is.

Over roughly three decades, researchers have proposed and used pathological grief, complicated grief, complicated grief disorder, prolonged grief disorder, and persistent complex bereavement disorder to describe broadly the same territory. Different research groups, different criteria sets, overlapping but not identical.

The current formal answer is prolonged grief disorder, which entered the DSM-5-TR in 2022 (American Psychiatric Association, 2022) and appears in the WHO’s ICD-11.

So if you’ve encountered several terms and assumed you were missing a distinction, you weren’t. They’re largely competing labels for one phenomenon, and “complicated grief” is the one that dominated the research literature before the diagnosis was formalised.

What the diagnosis requires now

The DSM-5-TR version turns on duration and on a specific quality of the grief rather than its intensity.

The death has to have occurred at least 12 months ago for an adult. Since then, there must be persistent, intense yearning for the person who died, or preoccupation with thoughts of them, present most days to a clinically significant degree, along with additional symptoms such as identity disruption, disbelief, avoidance of reminders, intense emotional pain, difficulty re-engaging, emotional numbness, a feeling that life is meaningless, or intense loneliness.

Two qualifiers matter more than the list. The reaction must exceed expected cultural and social norms for the person’s context, which is the manual acknowledging that grief practices differ enormously. And it must cause clinically significant distress or impairment.

Note what isn’t there. Nothing about crying, nothing about how much you loved them, and no requirement that you’ve stopped functioning.

The manuals disagree by six months

Here’s the detail that rarely makes it into consumer writing, and it’s the most useful thing on this page.

The DSM-5-TR sets the threshold at 12 months after the death for adults. The ICD-11 sets it at six.

Same name, same broad concept, half the waiting period. And because a threshold determines who counts, the two produce different numbers. In a study applying both criteria sets to the same bereaved sample, point prevalence ranged from 4.7% to 6.8% depending on which was used, with the DSM-5-TR version yielding significantly lower prevalence than the ICD-11 version (Treml et al., 2024).

Sit with what that means. Whether a grieving person has a diagnosable disorder can depend on which manual their clinician works from. Not on how they feel. On the reference book.

Why the disagreement matters to you

Three practical consequences follow, and they’re worth knowing before you go into any appointment.

If you’re between six and twelve months out, you may be told you can’t be diagnosed yet under one system while meeting criteria under the other. That’s a statement about the calendar, not about whether you need support.

Prevalence figures you encounter online will vary for the same reason, so a number quoted without its criteria set doesn’t tell you much.

And most importantly: waiting for the twelve-month mark to seek help is a misreading of what the threshold is for. Diagnostic criteria exist so clinicians can be consistent with one another about who they’re studying and treating. They were never meant as a bar you must clear before your difficulty counts, and a grief that’s frightening you at month eight is a reason to talk to someone at month eight.

The objection worth taking seriously

This diagnosis attracted real criticism when it was introduced, and it wasn’t fringe.

The central worry is medicalising a universal human experience. Grief is not a disease, and a category that catches too many people risks turning love and loss into a treatment target. Maarten Eisma set out the challenges and controversies around the ICD-11 and DSM-5-TR versions directly, including concerns about the criteria themselves and about how the two systems diverge (Eisma, 2023).

There are reasonable answers to the objection. The criteria require a year, functional impairment, and a reaction exceeding cultural norms. Estimated prevalence sits under 7% of bereaved people, so the great majority of grief falls outside it by design. And people in this territory frequently want help and haven’t been able to get it taken seriously without a name for what’s happening.

Both things can hold at once. The diagnosis is a real attempt to reach people who were being missed, and the risk of overreach is real too. What you shouldn’t be told is that this is a settled question.

What separates it from ordinary grief

Not intensity, and not how long you think about them. The distinguishing feature is closer to being stuck.

Ordinary grief, even severe and prolonged grief, tends to change shape. The waves space out. The person becomes possible to think about without the whole day going. Life gradually admits other things without that feeling like betrayal.

In prolonged grief disorder, that reshaping doesn’t happen. The yearning stays at close to its original pitch, the preoccupation continues to organise the day, and there’s often persistent avoidance of reminders alongside an inability to stop seeking them. Many people describe a sense that a piece of themselves went missing rather than that someone died.

Our guide to what the research actually says about the stages of grief is worth reading alongside this, because the stages model has convinced a lot of people that they’re grieving wrongly when they’re grieving normally.

Why the second year is often the hard one

Something structural happens around the first anniversary that almost nobody is warned about, and it matters here because it’s the same point the diagnosis becomes available.

The first year has scaffolding. There’s a funeral, there’s paperwork, there are people checking in, and there’s a widely shared understanding that you’re in the middle of something. Every occasion arrives labelled: the first birthday without them, the first Christmas.

Then the scaffolding comes down. The messages stop. The firsts are done, so there’s no longer a script for what a Tuesday in year two is supposed to feel like. And the people around you, entirely reasonably, have absorbed the loss into the past tense while you have not.

So the second year frequently feels worse while looking, from outside, like the point at which you should be improving. That mismatch is where a lot of people conclude something has gone wrong with them.

It’s worth separating two things that arrive together here. A hard second year is extremely common and is not in itself a disorder. What the diagnosis describes is something more specific: grief that hasn’t changed shape at all, still organising the day at close to its original intensity, with avoidance that’s growing rather than shrinking. Plenty of people have a brutal second year and are grieving entirely normally.

It isn’t depression, and the distinction changes treatment

They overlap and they frequently co-occur, but they aren’t the same thing.

Depression is typically pervasive: low mood across most domains, with self-criticism and worthlessness that attach to the whole self. Grief, including prolonged grief, is oriented towards a specific person and a specific absence. People with prolonged grief can often still experience pleasure in areas unconnected to the loss, which is not typical of a major depressive episode.

This matters practically because the treatments differ. Grief-focused therapies are built around the loss and around re-engagement, and general depression treatment doesn’t automatically deliver that. Our comparison of how clinicians tell grief and depression apart covers the differential in detail.

If both are present, and they often are, that’s worth naming explicitly rather than letting one label absorb the other.

What helps

Grief-specific therapy exists and is the thing to ask for by name. Treatments developed for prolonged grief work on the loss directly rather than treating it as generic low mood, and they typically involve both processing the death and rebuilding engagement with a life that continues.

Naming the avoidance is often where progress starts. Most people in this position have a list of things they don’t do: a road they don’t drive, a photograph they don’t look at, a name they don’t say. The avoidance is protective in the short term and is usually part of what’s holding the pattern in place.

Support groups do something individual therapy can’t here, because the specific loneliness of prolonged grief is partly about being surrounded by people who have moved on and can’t be asked to keep going back.

And if you’re seeking a therapist, ask directly about bereavement experience. Our guide to finding the right therapist covers the search, and grief work is specialised enough to be worth holding out for.

When to get help sooner

Some things shouldn’t wait for any threshold, twelve months or six.

Any thought of ending your life, including the passive version and including the wish to be with the person who died. Being unable to work or care for yourself many months on. Drinking that’s escalating. Avoidance that’s expanding rather than contracting.

Those warrant same-week attention or a crisis line today. Bereavement is a recognised period of elevated risk, and the fact that your distress has an obvious cause makes it more understandable, not less serious.

The takeaway

You’re not grieving wrongly. There’s no correct shape, and the model that told you there was has poor evidence behind it.

What does exist is a clinical picture where grief stays at full intensity and stops reorganising itself, affecting under 7% of bereaved people, which two major diagnostic systems currently define differently by six months. If that describes you, the useful part isn’t the label. It’s that grief-specific treatment exists, works on the loss rather than around it, and doesn’t require you to be finished with missing them.

Nothing in any of this asks you to let go of her. The aim is a version of carrying it that leaves room for the rest of your life, which is a different thing entirely.

Frequently asked questions

Sources

1. American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text revision). Prolonged grief disorder.
2. Eisma, M. C. (2023). Prolonged grief disorder in ICD-11 and DSM-5-TR: Challenges and controversies. Australian & New Zealand Journal of Psychiatry. doi:10.1177/00048674231154206
3. National Institute of Mental Health. Coping with grief and bereavement.
4. Treml, J., Linde, K., Brähler, E., & Kersting, A. (2024). Prolonged grief disorder in ICD-11 and DSM-5-TR: Differences in prevalence and diagnostic criteria. Frontiers in Psychiatry, 15, 1266132.
5. World Health Organization. International Classification of Diseases (11th revision). Prolonged grief disorder.
6. American Psychiatric Association. Prolonged grief disorder: Course, diagnosis, assessment and treatment. Focus.