While the patient lies back comfortably, the doctor marks out the donor sites, which are located at the back and sides of the scalp. Hair follicles (tiny sacks that contain one or several hairs) are harvested from the site, one by one, using a punch, a kind of miniaturised tool. Since the follicles are no bigger than a pinhead, no marks are left behind. Then, the graft is injected into the balding area of scalp using a special pen, with no need for any incisions. The patient can resume their usual activities the very next day.