my son is now 37 and he has had cronic hives starting in high school, he had them terrible for a year or so and then many years went by no hives and now the past couple of years hives are back everyday. he goes to a good allergist who has done lots of blood works up, his histmine level was over 1100. any ideas the allergist says he has never seen histmine levels so high. Any ideas he has had him of several diff medicines, they help for a while but then the hives are back. Thank you




