Labiaplasty is the surgical reduction or reshaping of the labia minora, the inner lips of the vulva. In some cases the labia majora — the outer lips — or the clitoral hood are addressed in the same operation. It is a soft-tissue operation on the external genitalia, performed as a day case.
What it treats is a specific, mechanical problem: labial tissue that projects far enough to be caught, rubbed, or compressed. What it does not treat is a longer list, and it is worth being explicit about it before anything else, because a great deal of marketing in this category implies otherwise.
Labiaplasty does not tighten the vagina. The vaginal canal is a separate structure and is not touched by the operation. It does not treat urinary leaking or stress incontinence, which are pelvic floor and urethral problems requiring a different assessment altogether. It does not treat vaginal laxity after childbirth. It does not treat pelvic organ prolapse. It is not a treatment for reduced sensation, and it is not offered here as a way to change sexual function.
If the concern is any of the above, labiaplasty is the wrong operation and the consultation will say so. Symptoms of that kind need a diagnosis first — often from a gynaecologist or a pelvic floor physiotherapist rather than a plastic surgeon.