Diarrhoea and MS

Can anyone help me please?

I live as carer to someone with MS who has suffered for 31 years.

In August the MS stepped up a gear, and he has been suffering with extreme diarrhoea.

He was admitted to hospital the day before Christmas Eve where he still remains, but it seems they cannot do anything to help with this issue.

Can anyone advise me if they have any recommendations as to what can be done, or how we can help him have a better quality of life please?