FUE or Follicular Unit Extraction, is a minimally invasive hair transplantation technique in which follicular unit grafts (hair follicles) are individually removed from the patient's donor area using a circular cutting instrument and then individually transplanted to the recipient (thinning) area where hair no longer grows.
When extracted properly in an intentionally randomized fashion, these circular extraction sites heal rapidly and leave very small, imperceptible white dots in the donor hair area easily camouflaged by the remaining hair. These tiny extraction sites are difficult to see and would require a closeup inspection or a trained eye to identify them at all.