Cindy (Ililnois, USA) on 03/19/2023:

It occurred tome that sneezing = histamine = dehydration and, so, thought that perhaps the 2 cup cure for indigestion and headache might work for that and, SO, to make a long story short, drinking a large glass of water stopped both the sneezing and the running nose.
For one who is forever telling people to hydrate, when I get busy, I don't. ROFL! I'm often dehydrated. Not to the critical degree that got me interested in hydration in the first place but the body DOES slap me upside the head to remind me. Whether with that "Oh no! " approach of indigestion or a headache or, duh, SNEEZING!
Mmsg (Somewhere, Europe) on 06/15/2020:

Charity just posted these words on the New EC site: "stress causes dehydration which causes histamine to be released". Hmmmmm, taking this a step further, could dehydration be a co-cause of a hay fever attack?? I wonder.
Having started drinking more water recently (mainly boiled tap water), the hay fever attacks HAVE reduced significantly. I wonder about that. If so, it's an easy way to feel more comfortable!