Rejection

My son is 30. He lives in residential nursing care with complicated health issues and challenging behaviour.  Over the past 6 months his behaviour has become much more challenging with refusal to shower, have his hair cut but more importantly, does not want to see me at all. I'm finding it very distressing and at my wits end as to what I can do... any and all suggestions would be very much appreciated by this community. Thank you so much.