This condition is known as complicated grief, or prolonged
grief disorder. It is estimated to affect about 2 to 3% of the population
worldwide. Complicated grief is characterized by intense grief that lasts
longer than would be expected according to social norms and that results in
impairment in daily functioning. Complicated grief can succeed the loss of any
close relationship.

Psychotherapy (under the supervision of a
psychiatrist, or clinical psychologist) is an effective therapeutic option for
complicated grief and is considered as the first-line treatment. To date, the
treatment that has been most extensively studied is a short-term approach called
complicated grief treatment. It aims to identify and resolve complications of
grief and to promote adaptation to loss. Clinical trials have shown that
interventions that include strategies to reduce avoidance of activities and
places that trigger reminders of the loss are more effective than those that do
not employ such strategies.

Antidepressants as well are commonly in practice, despite the
lack of supporting scientific data.