I find that walking in the rain, heavy-ish rain with an umbrela, breathing through the nose out through the mouth in cold weather helps with all sorts of allergy, sneezing and so on. I believe in weather conditioning ,at the risk of sounding amaturish, walking is good.
I remember not long-ago i went to bed and in the middle of the night i had to wake up, my body temperature was so high that i had to stand under the cold shower(freezing cold shower) for a long time. I learnt latter that i have an allergy to Alcohol and other stuff, luckly wine seems harmless.
So many pianists,composers? /musicians suffer due to illness.