On rare occasions, some areas of the hair transplant may require an additional touch-up session to increase density, reimplanting some follicular units, if your doctor considers that the objectives set with the procedure have not been met. It is a quicker procedure than the main transplant session, and must be performed one year after the first procedure. A touch-up is different from a second transplant: some patients need two interventions in order to cover all their baldness, or to modify the frontal hairline.