What Is The Purpose Of Labiaplasty? Labiaplasty is a surgical operation performed to prevent the labia minora (inner lips) in the female genital ratio from hanging over the labia majora (outer lips). It helps the patient to have a healthier genital area which does not cause them any discomfort or trouble by cutting the excess part of the labia minora. With adolescence, the inner lips may become dark, sagging and much larger than they are supposed to be.