Time, ice will help it from swelling when it first happens but after that there's not much you can do but give it some time. and move your head more : )
If you haven't broken it then it should be ok. There's always going to be something sore if you're sparring regularly. I'd be more concerned about sparring with (say) a joint injury than I would about sparring with a sore nose.
i had a sore nose after my first fight but i just carried on sparrin through the pain but i had troouble breathing so i saw a doctor and it turned out id broke it and if i would have taken a clean shot in sparrin it would have been halfway across my face so dont take the risk
nassle spray works really well, even if its hard to breath because of it being sore the nassle spray really opens you up
