It happens to me all the time. I think its the increase in mucus. When you sleep it all settles then when you're draggin your bum to the bathroom. All the mucus start to drain and the pressure change in your sinuses causing the horrible sneezing fits...yaaaay biology stinks!! Lol
Just keep the tissues handy.
I cough, I sneeze, I end up peeing in my pants and make several trips to bathrooms during night time....
Me too. I always wake up and start sneezing.
This has happened to me but i have no idea y !