Yes, please have him go back to the hospital as soon as possible, for it can be a blockage in his intestines, or something they have done wrong, or left in him. That can be extremely dangerous, so don't waste any time.
Lord have this Father be taken care of well in the hospital, and may they be able to help him. Direct the doctors to find out why he is so blocked and do the right thing for him. Be with him and his family as you have your perfect will done in his life and this situation. In Jesus precious name I pray amen.