It's not easy to treat hoarding disorders, even when the person is prepared to seek help, but it can be overcome.
The main treatment is cognitive behavioural therapy (CBT). The therapist will help the person to understand what makes it difficult to throw things away and the reasons why the clutter has built up.
This will be combined with practical tasks and a plan to work on. It's important that the person takes responsibility for clearing the clutter from their home. The therapist will support and encourage this.
Antidepressant medicines called selective serotonin reuptake inhibitors (SSRIs) have also been shown to help some people with hoarding disorders.