Can the radix of someones nose be lowered/flattened?

Yes, the radix (nasal root) can be lowered surgically to create a clearer separation between the forehead and nose, especially when the radix is naturally high or blends too smoothly into the glabella.
Here’s what to know:
Radix reduction involves shaving or reshaping the upper nasal bone and adjacent cartilage to create a more defined starting point for the nasal bridge. This can enhance facial balance and improve the overall nasal profile.
However, lowering the radix does influence how much slope or curvature can be created in the bridge:
A lower radix leaves less room for a deep concave slope without risking an unnatural or over-resected appearance.
Surgeons often find a balance — lowering the radix just enough to create separation from the forehead, but not so much that it restricts a harmonious dorsal aesthetic line.
In expert hands, the radix can be carefully lowered while still allowing for an elegant, natural-looking bridge contour. It’s a matter of proportion, anatomy, and planning.
A thorough consultation with a rhinoplasty specialist — ideally with digital simulation — can help clarify how your radix position affects your ideal profile.
— Güray Yeşiladalı, MD

In a nose with a high dorsum often times there is no clear ending of the forehead and beginning of the nose. Lowering the radix will create a more acute naso frontal angle and actually give the appearance of not only reducing the hump but also shortening the nose. The amount that the radix can be lowered is substantial and you can have whatever slope to the dorsum you would like.