Grief is supposed to get better. That's what we're told — that it comes in waves, that the waves become less frequent, that eventually you find a way to carry the loss without being capsized by it. For most people, this is roughly true. Grief is devastating and then, slowly, with support and time, it becomes something that can be lived with.

For others — perhaps 1 in 10 bereaved people — something different happens. The acute pain doesn't ease with time. The yearning stays as raw at two years as it was at two months. The person finds they cannot reengage with life in any meaningful way — cannot work, cannot connect, cannot imagine a future that doesn't feel defined entirely by the absence of the person who is gone. They often feel guilty for not "moving on." The people around them begin to wonder, quietly, why they haven't.

In 2022, the American Psychiatric Association made a landmark clinical decision: Prolonged Grief Disorder (PGD) was added to the DSM-5 — becoming the only new diagnosis in the Text Revision of the fifth edition. This was not simply a labeling exercise. It was an acknowledgment that grief, for a significant minority of bereaved people, does not follow the expected trajectory. It becomes a clinical condition requiring specific treatment. And it is one that the mental health system is still learning how to recognize and address.

This article explains what Prolonged Grief Disorder is, how it differs from normal grief and from depression, who is most vulnerable, and what the evidence says about treatment that actually works.

What Normal Grief Actually Looks Like

Before defining what prolonged grief disorder is, it helps to be clear about what normal grief involves — because many people experiencing it believe their response is abnormal, when it is in fact a healthy and expected reaction to profound loss.

Normal grief is not linear, mild, or time-limited in any simple sense. It can be intensely painful for months. It can involve waves of acute sadness, intrusive memories of the deceased, yearning, anger, guilt, disorientation, physical exhaustion, and temporary difficulty functioning. These are not pathological responses — they are the appropriate neurological and emotional responses to the severance of a significant attachment bond.

Research by grief scientist George Bonanno and others has established that most bereaved people follow what's called a resilience trajectory — relatively stable functioning throughout, with periods of distress that gradually diminish. A significant minority experience more prolonged acute grief that still resolves over 12–18 months. The key feature of both normal trajectories is that change is happening — the pain is real and intense, but it shifts over time, and the person retains some capacity to engage with life.

What Is Prolonged Grief Disorder?

Prolonged Grief Disorder is diagnosed when acute grief symptoms remain intensely distressing and functionally impairing for at least 12 months after the death of a close person (6 months under ICD-11). The diagnosis was created specifically to capture a grief response that is qualitatively different from normal grief — not just slower to resolve, but stuck in a way that causes ongoing significant disability.

The defining feature of PGD — what distinguishes it clinically from the intense pain of normal early grief — is not the severity of distress but its trajectory. In normal grief, some accommodation to the loss is occurring even when the pain remains acute. In PGD, this adaptive process has stalled. The person experiences a kind of psychic paralysis around the loss, unable to integrate it into their ongoing life, often dominated by the sense that meaningful life is simply not possible without the person who died.

Normal Grief vs. Prolonged Grief Disorder: Key Differences

Prolonged Grief Disorder often looks like isolation — a withdrawal from life and relationships that, from the outside, may be misread as depression, introversion, or simply "still grieving." Without clinical recognition, many people live in this state for years.

Who Is Most Vulnerable to Prolonged Grief Disorder

While PGD can affect anyone following bereavement, certain factors significantly elevate risk. Understanding these helps explain why the condition's prevalence varies so dramatically across different types of loss.

The Post-COVID Grief Surge

The COVID-19 pandemic created bereavement conditions unlike any in recent history. Millions of people lost family members rapidly, unexpectedly, and in circumstances that stripped away the rituals and support structures that normally buffer the acute phase of grief — no hospital visits, no gathered family, disrupted or impossible funerals, isolation during the weeks and months of early bereavement when support is most needed.

Research has documented the consequences. Among those bereaved by COVID, PGD prevalence rates in studies range from 37.8% to 64.1% — dramatically exceeding the 7–10% baseline. The pandemic also produced what researchers have called bereavement overload in communities hit hardest — the loss of multiple significant people in rapid succession, which creates compounding grief that the psyche cannot process in sequence.

What Comes Alongside Prolonged Grief

PGD rarely exists in isolation. Bereaved people with PGD frequently present with co-occurring conditions that interact with and amplify the grief disorder:

• Major depressive disorder — present in a significant proportion of those with PGD. Shared features (withdrawal, functional impairment, sleep disruption) can make clinical differentiation difficult. Both require treatment, and treating depression without addressing the grief-specific mechanisms often produces incomplete relief.
• PTSD — particularly when the loss was traumatic. Intrusive images, avoidance, hypervigilance, and emotional numbing can all be present in both PGD and PTSD. The two can co-occur and require integrated treatment approaches.
• Substance use — alcohol and drug use as self-medication for grief pain is common in bereaved individuals with PGD, and can significantly complicate treatment and delay recovery.
• Suicidality — people with PGD show elevated rates of passive suicidal ideation ("wishing to join" the deceased) and, in some cases, active suicidal thinking. This requires direct clinical assessment.
• Sleep disorders — chronic insomnia, hypersomnia, and disrupted sleep architecture are common in PGD, compounding mood instability, cognitive impairment, and functional difficulty.

What Actually Works: Evidence-Based Treatment for Prolonged Grief

The most important clinical development in the PGD field is that effective treatment exists and is distinct from standard depression treatment. Research by Katherine Shear at Columbia University and colleagues has established that grief-specific therapy — particularly Complicated Grief Treatment (CGT) — produces significantly better outcomes for PGD than interpersonal therapy or antidepressants alone.

One of the hardest aspects of prolonged grief disorder is the social expectation that grief should be "over" by now. The bereaved person often withdraws rather than burden others with pain that seems, to the outside, to have lasted too long — when in fact it is a recognized clinical condition with effective treatment.