Hi, I was just told by my daughter s doctor, she is 10 yrs old, that she has high histamine levels and swollen abdomen. She breaks out in hives from head to toe, swollen joints and slight fever for 10 days on a pretty regular basis. I asked what to do and he said nothing it should balance out in 6mths to a year. But I want to know if I should change her diet or add more vitamins. Please advise.