In order to avoid embarrassment in public, we often suppress a sneeze. But the habit is very harmful than we can think. The force of a sneeze reaches 100 miles an hour or more! But holding the nose, or closing the mouth, means that all that air can’t escape, so it has to go somewhere else, which could cause unexpected damage.
Like the man who tried to suppress a sneeze by closing his mouth and pinching his nose. But during the attempt, he ruptured his pharynx due to the pressure of the sneeze. He had to spend several days in the hospital, where he was fed with a nasogastric tube.