Skin bulge in the nasolabial fold, what can I do to fix this? (Photos)

It's very hard to show it on pictures but my nasolabial folds, instead of making a line, they make a skin bulge, as if I had too much "fat" in just that area and it shows especially when I smile. I've never seen anyone else have this and I don't even know what it is and why I have this. It makes my face and lips look very asymmetrical, especially since the "bumpiness" is more prominent on my left side. What can be done to correct this?