Greetings.
Maintain a healthy diet. See a qualified dermatologist near you - for sagging of the skin of the face you may need creams / lasers - but unlikely youll have too much skin ageing at the age of 22.
For breast contouring you'll need to seea qualified plastic surgeon. Also - eat lots of fruits and vegetables and exercise regularly.
Health Tips
(Caution: do not be lured by unrealistic claims and offers made by quacks who claim to be specialists in trichology n cosmetic sciences or even saloons. Make sure u are treated by a qualified dermatologist). Warm regards, Dr Govind Suresh Mittal, Bengaluru.