Follicular Unit Extraction is a minimally invasive hair restoration technique performed under local anaesthesia on an outpatient basis. Individual follicular units — naturally occurring groups of one to four hairs — are extracted from the donor area using a specialised punch instrument of 0.6 to 1.0 mm diameter. The extracted grafts are stored in a chilled preservation solution to maintain viability. Recipient sites are then created in the thinning or bald area at angles and densities designed to replicate the natural growth pattern, and each graft is placed individually.
Candidacy is determined primarily by donor density and the extent of hair loss. Patients with insufficient donor density — whether due to advanced loss, fine hair calibre, or previous over-harvesting — may not achieve adequate coverage. The Norwood scale for male pattern baldness and the Ludwig scale for female pattern loss are standard tools for grading severity and planning graft estimates. Underlying conditions causing diffuse hair loss (alopecia areata, telogen effluvium, hormonal disorders) must be excluded or stabilised before surgery is appropriate, as active hair loss will continue regardless of transplanted grafts.
In the days following surgery, small scabs form around each graft and shed over approximately ten days. A phenomenon termed shock loss — temporary shedding of both transplanted and surrounding native hairs triggered by surgical trauma — is common and resolves over several months. Transplanted hairs typically shed within two to four weeks and begin regrowing at three to four months. Final density and naturalness of result are not assessable until nine to twelve months post-procedure, and a second session may be required for desired coverage.