ERP stands for exposure and response prevention. It is one of the psychological treatments of choice for Obsessive and Compulsive Disorders.
The idea behind it is to decrease your anxiety levels by exposing you to the things that make your anxiety spike. This sort of therapy normally starts by gradual increase of anxiety triggers e.g. start with the things that might you spike less and slowly work towards those that make you spike more.
I read a quote once that said something like this: “It is best to suffer the worse right now than to live in perpetual fear of it”
The same it is with anxiety related ROCD. And this is what ERP intends to do: to take the perpetual fear of something and put it into the present, enabling us to face our fears. The more we do this, the less fearful or anxious we become.There are different methods of delivery for this type of therapy: self-help through books, online-phone sessions and face to face sessions. One might be more beneficial for some than others.