Hello,Great Questions. You definitely can wear a helmet after having a chin implant. However, you will need to wait at least a few weeks. A chin implant, once settled, will not move short of anything except breaking your jaw. This would take at least 4 weeks, but you might wait 8 to be safe. However, it tends to be that pressing on a chin after chin implant is uncomfortable for several more months. Perhaps in your case not, or perhaps you can just work through it. As far as the nose. You will want to be very careful about striking your nose after a rhinoplasty. Your nose will take at least 2 months for the bones to be reasonably solid, but even at that, a descent hit can break things loose. Of course, wearing a helmet is supposed to keep balls, knees, elbows, etc from hitting your nose. However, helmets occasionally get yanked off and then there are practice drills where no helmet is worn. You must consider these things.Best of Luck,Dr. AAustin, TX