What is codependency, and is it a useful concept?
Codependency loosely describes a relationship pattern in which one person's sense of worth becomes organised around meeting another's needs, often to their own detriment. It is widely used and — importantly — it is not a clinical diagnosis.
Where the term came from. It originated in the 1970s and 80s within the addiction treatment field, describing spouses and family members of people with alcohol dependence whose behaviour appeared to sustain the addiction — covering for them, managing consequences, organising life around their drinking. The concept then expanded enormously through the self-help movement, notably Melody Beattie's work, until it covered almost any pattern of over-involvement.
The behaviours usually described: difficulty saying no; deriving self-worth primarily from being needed; taking responsibility for others' feelings; suppressing your own needs; difficulty identifying what you actually want; tolerating poor treatment; and attempting to fix or rescue people.
Why the concept is contested, and the criticisms are substantial:
It has no agreed definition and appears in no diagnostic manual. Different sources describe substantially different things.
It is so broad as to describe almost anyone. Caring about people, adjusting to a partner's needs and finding meaning in helping are ordinary features of relationships, not pathology.
It has historically pathologised caregiving, which fell disproportionately on women — labelling as a disorder behaviour that was socially expected and often practically necessary.
It can shift blame onto the person being harmed. Framing a partner's behaviour around an addicted or abusive person as their own disorder is a serious problem, and this critique has been made forcefully. Someone adapting to survive a difficult situation is responding to circumstances.
What is more useful. The specific components have better-supported equivalents: boundaries, enmeshment in family systems theory, attachment anxiety, people-pleasing, and carer burnout — each more precisely defined and more actionable.
If the pattern resonates, a therapist can work with the specifics rather than the label.