Bump on left side of nose. How is this corrected? (Photo)

Click on the "Web reference" link, just below my response, or go here:
FacialSurgery.com/RealSelf/RealSelf_boobsgalore30.html
I made a computer morph of your nose, and an animation of the morph, to show the changes that should be possible for your nose.I simulated moving that left nasal bone back closer to the middle of your nose. I think that's what's required. It doesn't look as though filing it down would help.
I'd love to hear what you think of the morph. Did it seem to address your main concerns?Read my "Web reference" link, just below, for more info.

You would need a face to face examination to better evaluate this deformity.  It is in the keystone area of the nose so it likely involves bone and some cartilage.  Best case scenario is that a simple rasping of this area is all that is needed.  However an infrature of the nasal bone on that side may also be required for symmetry.  

The area of the bump is rhinion and it is a small rhinion bump or horn. A gentle shave and filing down of that area will improve the appearance in a subtle way. RegardsDr Janjua

Thanks for your question. From your pictures the left nasal bone is displaced and you appear to have a septal deviation. Without other views and/ or an examination of your nose, it would be difficult to give you a definitive answer. However, you would be an excellent candidate for a rhinoplasty/ nasal correction. This should be easily accomplished to correct your issue creating a natural appearance with the subtle changes you desire. Please consult with an experienced rhinoplasty expert to be evaluated and discuss your options.

The dorsal hump is usually composed of both bone and cartilage, which must be shaved down.  Osteotomies will then be required to narrow the bridgeline