Rhinoplasty can effectively correct problems such as a bulbous tip and a nose that is upturned -- these can be a complex combination of problems that a surgeon who specializes in rhinoplasty should address.
The appearance of a "bulbous tip" most commonly arises from the shape of the underlying cartilages. If this is the case, the lower lateral cartilages (tip cartilages) can be trimmed and reshaped either with sutures or with grafts to relieve the excess curvature.
An upturned nose can be rotated downward. This usually involves using a cartilage graft from the septum to lengthen the nose and to support the tip.
To get a better understanding of what your nose would look like after surgery, your prospective rhinoplasty surgeon should be able to show you before and after computer simulations. Many rhinoplasty surgeons use computer imaging, and recently 3D rhinoplasty imaging has become available.