If you father drinks own urine through his nostrils more and more at a time and do it many times in a day then they have to blow his nose properly and in addition he has to blow his nose as many times as he can
I think he keeps his mouth open if so then try to keep his mouth as shut most of the time
I think he has upper part such as above chest to head is warmer in comparison to his lower part such as foot
If still he feel cold, sinus, migraine then let me know
If he starts urine therapy then he is not to use any other therapy
regards
Dr Lodha