Why does my nose lean more to the right? One nostril is bigger than the other (Photo)

Hello and thank you for your question. Nostril asymmetry is usually related to the underlying cartilage structure of the lower lateral cartilage.  This can be improved with surgery.   Make sure you specifically look at before and after
pictures of real patients who have had this surgery performed by your surgeon
and not just a computer animation system. The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

Typically the nose leans one way or another because of a deviated septum or deviated bones.  The picture that you show makes it hard to assess without seeing the full face.  Your doctor can evaluate you during the physical examination to determine the exact cause.