Histaminic reactions cause sneezing, etc. designed to surround the irritant with mucous and then blast it away from the offended tissue (body) and into another tissue (Kleenex.) Problem solved - or should be.

Sometimes the body detects the mucous it sent to remove the irritant as another irritant - which it might be, sorta, until you blow your nose. Problem #2 solved. We hope.

Sometimes the body's immune system goes into hyperdrive or autoimmune response mode, and sees the minor irritation of the mucous it sent as another irritant and says, "Irritation alert! Send more mucous!"

Sneeze that out, nose itching and eyes watering by now, and the message becomes, "More irritation! More mucous! More mucous!"

Now you're in autoimmune response mode, with cytokenes carrying the messages, also known as a cytokene storm.

Once you know how the system works it's easier to combat it.

Asthmatics and allergy sufferers (and our conditions are exacerbated in LC) tend to produce too much mucous. N-acetyl cystiene or NAC for short, naturally regulates the body's mucous production. Cystreine is a protien the body makes all by itself that is insufficient in some people. NAC gets cysteine into the body orally and taken daily (600 mg capsules, one, maybe two daily) during pollen or allergy season keeps the excess mucous in check. It takes a while to absorb. It's not a relief agent - it's more like preparing the body to say, "We're ready" when the pollen-mucous attack hits.

Quercitin is a B vitamin that boosts up the body's ability to fight off allergins - not limited to just pollens. NOW labs makes a good one - 800 mg capsules with bromelain.

Preventatives are better than pills - but if somebody gives you a boquet that sends you into a fit, get rid of it and air out the house. And if you need a pill or a spray, don't wait - treat it aggtressively right up front and you'll wind up feeling better quicker and taking fewer pills per episode.
A good antihistamine, with no rebound effect, jitters, or nosebleeds: Cetrizine (antihistamine tablet)

Nasal spray that doesn't turn your nasal tissue into a parched, cracked, and bleeding mess: Xlear (nasal spray - natural ingredient based.)

Stay way up on your B-complex (especially B12, B6, and B3) and C vitamins, and watch the dairy and wheat intake. Eliminate dairy (except good butter) and all wheat for about a month to let your body heal - then re-introduce "this is a test" amounts later. If allergies flare up, you know what to do...

Here's how it orks: One part of the immune system is connectede to all the others. When I ate a lot of ice cream in the summer (love good ice cream - or used to) my nose would go haywire. When I quit, the nose got better. Or if I got a snootful of pollen and later ate some ice cream, it was good for a bronchial asthma attack.

If you've read this far I apologize for the long-windedness, but hope there's something of benefit here for you. I've had to become my own research team, caregiver, and advocate as the docs just want to run allergy tests to see if I'm allergic to what I told them I'm allargic to, and then prescribe nasal-passaage-destroying synthetic steroid sprays, etc. that cause further long-term damage. I've found natural preventative and theraputic approaches as listed aabove that have given me more relief, now, sixty years later, than I've obtained previously. I hope it shortens the path to relief and recovery for you.

Good luck, and God bless.