A useful rule of thumb: the more a problem lives in a person's relationships, the more a group has to offer. For isolation, shame, and the sense of being uniquely afflicted, there is no better medicine than a room of people who understand.
Group therapy is applied across most of mental health, from depression and anxiety to substance use, trauma, grief, and eating disorders, and it is central to structured programmes such as dialectical behaviour therapy. It is especially suited to problems that are social or interpersonal in nature, and to difficulties marked by isolation and shame, where being understood by peers is itself part of the cure. The right format, from open process groups to structured skills classes, depends on the problem being treated.
Depression
Depression was among the first targets of structured group treatment, and it remains a common one. Cognitive behavioural groups teach the same skills as individual CBT, recognising and testing negative thoughts and re-engaging with rewarding activity, while adding something the individual version lacks: the company of others fighting the same fight. Depression thrives on isolation and the conviction that one is uniquely worthless, and both are directly countered by universality and by the quiet hope of seeing others recover. For people whose low mood is bound up with loneliness, the social contact of a group is not a side effect but part of the treatment.
There is a further, subtler benefit. Depression flattens a person's sense of usefulness, and the chance to help another member, to say something that lands, to be the one further along today, can restore a feeling of worth that no amount of self-talk supplies. This is Yalom's factor of altruism at work, and it is one of the ways a group reaches parts of depression that a purely individual approach can struggle to touch.
Anxiety and social anxiety
Group therapy is used across the anxiety disorders, and for social anxiety in particular it has a special logic. The very situation a socially anxious person fears, being seen and judged by others, is present in the room. A group becomes a graded exposure with a safety net: members speak in front of others, discover the feared catastrophe does not arrive, and build tolerance with real people rather than in imagination. The group supplies exposure and support in the same setting, a combination hard to engineer one to one.
The feedback loop matters too. A socially anxious person usually assumes they come across as awkward or unlikeable, a belief that never gets tested because no one tells them otherwise. In a group they can hear, honestly and directly, how they actually strike other people, and the gap between the feared self and the perceived self is often where the anxiety loosens its grip. Few settings outside therapy offer that kind of candid, caring feedback about how one is seen.
Where group therapy is especially suited
Some applications play to the group format's unique strengths so strongly that group is often the treatment of choice rather than a fallback.
Substance use
Group work is a mainstay of addiction treatment. Peers confront denial credibly, reduce the shame and isolation that drive relapse, and model recovery, whether in clinician-led groups or peer fellowships.
Trauma and PTSD
Groups of survivors offer a rare validation, the knowledge that others carry the same weight. They must be run carefully to avoid re-traumatising members, and are often combined with individual trauma work.
Grief and bereavement
Bereavement groups gather people through the same loss. Being among others who understand, without needing to explain, counters the isolating and often unspoken nature of grief.
Eating disorders
Groups are widely used, offering support and accountability, though they require skilled facilitation to prevent members comparing or competing around symptoms rather than recovering.
Chronic illness
Support groups for people living with a long-term physical condition ease the loneliness of illness, share practical coping, and reduce the psychological burden that so often accompanies chronic disease.
Interpersonal difficulties
For people whose main trouble is relating to others, the group is the ideal laboratory. Patterns appear live and can be reworked with feedback, which no individual therapy can fully replicate.
DBT skills groups
One of the most established modern uses of the group format is the skills training component of dialectical behaviour therapy, developed by Marsha Linehan for people with intense emotional swings and difficulty regulating them. Here the group is deliberately more like a class than a process group. Members are taught concrete skills in four modules: mindfulness, distress tolerance, emotion regulation, and interpersonal effectiveness. They practise between sessions and report back the following week.
The group format is well suited to this because skills can be taught efficiently to several people at once, members reinforce one another's practice, and the shared learning normalises struggles that might feel shameful in private. In full DBT, the skills group runs alongside individual therapy, each doing a different job.
Matching the group to the problem
The word group covers formats that differ sharply in structure and aim, and part of good treatment is choosing the right kind.
A structured, curriculum-led group is a good fit where the task is to learn specific skills or information. An open process group suits difficulties that are relational and benefit from the group as a social microcosm. Support groups fit shared life experiences where mutual understanding is the point. Many people move between formats, or combine a group with individual therapy, over the course of their treatment.
A common misconception about who group is for
Group therapy is sometimes seen as a fit only for people who are already sociable and comfortable talking. The opposite is often true.
Group therapy is only for outgoing people who find it easy to open up.
Some of the people who benefit most are the shy, the isolated, and the socially anxious, precisely because the group gives them a supported place to practise the relating they find hard. The point of a group is not to reward existing social ease but to build it. Reluctance to join is common and is not a sign that group is wrong for someone.
Group therapy works for any problem equally well.
Group is powerful but not universal. Some people, and some moments in a crisis, are better served by individual work, and certain conditions call for group only alongside other treatment. Matching the person and problem to the right format matters, which is why assessment before joining a group is standard practice.
Bringing it together
Across this wide range of uses, a pattern holds: group therapy earns its place wherever connection, feedback, and the discovery that one is not alone are part of what a person needs.
A fair summary: group therapy is applied across most of mental health, in formats ranging from open process groups to structured skills classes, and it shines wherever a problem lives in a person's relationships or is fed by isolation and shame. It is not a universal answer, and matching the person to the right kind of group matters, but its reach and versatility are among its greatest strengths. The effectiveness page examines how well it actually performs.
Where to go next
Having seen what group therapy is used for, the remaining pages weigh how well it works and what the research shows.
Sources
- Yalom ID, Leszcz M. The Theory and Practice of Group Psychotherapy. 6th ed. Basic Books. 2020.
- Linehan MM. DBT Skills Training Manual. 2nd ed. Guilford Press. 2015.
- American Group Psychotherapy Association. Practice Guidelines for Group Psychotherapy. AGPA. 2007.
This page is educational and is not medical advice. It does not diagnose any condition or replace treatment. If you are struggling with your mental health, speak with a qualified professional about whether group therapy or another approach is right for you.