When I was in Bangkok a few months ago before the mask wearing was dropped, I wore a mask for several hours during the afternoon, and my nose was running constantly, In early evening I had the worst runny nose ever and as soon as I got back to my hotel and took the mask off, after a short time my runny nose stopped.
After that my mask wearing stopped apart from going into a supermarket, or the MRT with my nose staying uncovered all the time. If ever I feel obliged to wear a mask to save any hard feelings from anyone, my nose will be staying uncovered.