In general, noses don’t change their overall shape. However, there are a few points to be made here. One is that in general, patients with thin nasal skin will find over time that the skin will get even thinner; as if it “shrink wraps” onto the underlying cartilage and bone. In this instance, any slight irregularity will become very obvious. During rhinoplasty perichondrium (lining of the nasal septal cartilage) or fascia (thin lining of muscle) can be strategically placed as a thin buffer between the nasal skin and the underlying cartilage or bone, preventing the severe thinning/shrink wrapping that can eventually occur. Another possibility is the skin of the nose can become thicker with time. This typically occurs with Acne Rosacea, and along with the accompanying redness and thickening of the cheeks, the nose can become dramatically bulbous from this skin condition requiring surgery in which the skin is planed down with a laser to recreate better definition and a more refined nasal tip.Weight gain or loss will not change the shape of the nose at all. Yet because the cheeks have prominent fat in them, should they become larger or smaller, the ratio or perspective of the relative size of the cheeks to the nose can give the illusion of the nose appearing larger or smaller. Finally, patients that have weak nasal tip cartilage will notice over the decades that the tip will start to droop. This can be corrected with rhinoplasty to avoid this if caught early, or to correct it in the later stages of time. Hope you found this answer helpful. All the best!