I’m so sorry to hear of your suffering and understand your fears. You are certainly not alone, although it may feel that way. Do you believe you have symptoms of high intracranial pressure, too? That can be related to histamine problems and inflammation (and redness implies inflammation). Have you been able to try Diamox or any of the other suggestions in the book? I hope it can help you start to peel back the layers of this beast of a condition. Gentle hugs…