Ascites, Kidney function

My boyfriend has been more confused. I am not convinced it is HE since it doesn't act like his other times of having it...severe insomnia. It is more like he is a bit manic and in that state where you are half asleep so your words don't come out right. Today's labs looked better than last time for the most part where the liver is concerned. Bilirubin is down to 10 from 13 last week. However BUN and Creatinine have gone up. I don't know where they were during his last hospital stay but they are higher than they were 3 weeks ago. When do you get concerned about hepatorenal stuff? Also no one has said the words "portal hypertension" but I assume he has it since he has ascites? Thanks.