My son was diagnosed a few yrs back . I reacted wrong with anger and confusion.I realized I'm his biggest trigger how can I help him ?

How can I get my 20 year old grandson to bathe and brush his teeth. He has neglected them to the point that nearly all his teeth need work.

i my 21 year old son either has epileptic psychosis, or schiz, . is a symptom that we use to be very close now angry toward me . and does