My Son Is 30 Was Told He Has Crohns He

my son is 30 was told he has crohns he will not go back to the dr he is a pilot an can loose his license to fly he has been bleeding for a long time we have tryed everything he hurts all the time he is taking honey from newzealand right now helps a little butt still bleeding has been 2 years no reg bowel movement what do you think it is