Why do I sneeze while walking around or while standing but its stops when I sit or lay down, but the very second I stand up the sneezing starts again? This happen almost every 2 or 3 months. Peppermint oil seems to help stop the sneezing but allergy medicine doesn't seem to do anything. there is no mucus when I sneeze, it just seems to be runny and watery. This will last all day and usually only for 1 day. Does anyone else go through this or am I just weird?