The goal of rhinoplasty is to reshape your nose so that it complements your other facial features. The earliest recommended age for rhinoplasty is the mid-teens where the nose is near full development. As long as you are in good health there is no upper age limit for nose reshaping.
Reshaping is done through incisions inside your nose and between your nostrils. Your nose can be reduced or built-up by adjusting its supporting structure.
After surgery some discomfort, swelling and bruising can be expected, but they will subside gradually. You will wear a splint for approximately a week or longer and can wear cosmetics safely after its removal.