I was playing ball with the brothers in law some years back and the ball smacked me straight in the face (nose). After the initial pain settled, I was having issues with my breathing and went to the doctor, and despite my insistence that "something" was wrong they said nothing was out of order, and gave me a nasal spray. Eventually, one of the doctors spotted it, after several visits to the surgery and said I had a "deviated septum", and this did require surgery. Wasn't a major OP (overnight stay) and was back to normal within about a week.