Hello, There are different causes for nostril asymmetry and some are not correctable. In your case, it appears this is related to the tip leaning toward your left. In the bottom up view, imagine it like a tent with the columella in the middle being the central pole, and the ala (nostrils) being the side walls. If the central pole shifts toward on side, it will make one tent wall long and stretched, while the over shortens .... this shortening is also contributing to it being slightly more arched on that left side (front view). Try pushing the tip (with your finger) to the right. If this improves the symmetry, then you would be able to improve it by correcting the tip deviation with a revision rhinoplasty. The best overall advice with any rhinoplasty, revision or primary, is make sure you consult with a true rhinoplasty surgeon. Hope that helps. Good luck!