Nonsurgical rhinoplasty is performed by using a dermal filler to augment or “build up” the nose. Since volume and height can only be added, it can not actually remove a dorsal hump (bump on the bridge of your nose), but depending on how it is injected it can lessen the appearance of the hump.
The area of the bridge above the hump, connecting to the forehead, is referred to as the “radix”. Sometimes this area is too low, causing the hump to look even larger than it really is. When the area is augmented (built up and made higher), the result is a straighter profile and the appearance that the hump has been removed. This does result in an overall taller and more projected nose, so it works best for patients with a deep, or low radix.