
1. Help him, as much as possible, to turn to a psychoterapist, so he will receive the support of a specialist would help him better understand what is going through and what could make him get rid of these dark thoughts, so he can live life in a more pleasant way.
2.Do not minimize his beliefs; try to listen to him and support him, but without denying him the real suffering.
3. Talk to him about the emotions he feels and not about the symptoms. This will help him open up and stop thinking about his body so much.
4. This condition is very demanding and the person suffering from it, needs a lot of affetion and understanding.