Can Botox help define the bridge of my nose and narrow it out?

I don't recommend Botox for this. I recommend getting a formal evaluation with a cosmetic dermatologist to go over your desired results. Facial fillers (voluma, restylane, juvederm) can be used to improve the symmetry of the nose. Surgery would be needed to improve nostrils or overall shape. See an expert. Best, Dr. Emer

While Botox can be used to lift the nose tip a bit, it does not have any place in nonsurgical rhinoplasty. Typically, hyaluronic acid fillers are injected and instead of "bulking" up the nose. doctors shape it in such a way that noses appear straighter, thinner and more symmetrical. However, the procedure isn't for everyone.