You are so welcome, Marsha! And a huge thanks to all of the patients here who are contributing their knowledge and experience, also. Although I hate to keep mentioning the book, I have a feeling it may help you a lot, Marsha. In it, I summarize the tests for histamine and discuss fairly extensively why many of us think we have mast cell activation, but all we really know with certainty is that we have a histamine problem. That distinction is crucial for proper treatment. Also, many of us with high intracranial pressure are misdiagnosed with Miniere’s disease, so I can’t help but wonder about your case… 😉