Can I please have an anonymous post as this is quite sensitive.
How can I help my son?
He is staying at his nans house and has been for around 5 years. For context he is a grown adult not a child. He suffers with his mental health and as a result he hardly goes out, more or less lives in his bedroom and has really neglected looking after it to the point it has completely overwhelmed him. He knows he has to do something about it yet will not accept help from his dad or myself as he is too embarrassed to let us in which results in arguments, the house is not mine so I cannot just go in to sort it regardless.
He has finally sought help and will be having some therapy but in the meantime, his room is a major issue. I have told him to start with a little at a time each day etc, he says he will then says he will try. I just feel so helpless as I dont live nearby so I cant just go round there. I have said I will buy him a new bed and furniture but he needs to sort the room out first.
Does anyone have any advice on how I can help him. Im desperate
Source

Could you offer to pay for a professional cleaner/decluttering service? He may actually feel much more comfortable letting a stranger in than his parents. Someone experienced with severe clutter will have seen it all before and won’t judge him.