It’s unlikely that occasional yawning or laughing would harm your nose as it heals, but the less you do it, the better. Also, try not to laugh too loudly! The small muscles that attach your nose tip to your top lip slightly depress when you smile or laugh. It’s a sign that you’ve gone overboard when you laugh a little too loud and get pain in your nose. If at all possible, try to avoid yawning frequently for two weeks.