Shock loss is loss of the non-transplanted hairs after a hair transplant procedure. This is a rare phenomenon, but has been reported to occur in up to about 5% of cases. In my practice, I do not personally see shock loss happening even 5% of the time. The exact cause of shock loss is unknown, but is thought to be due to trauma to the scalp and possible loss of blood flow to the area. It most commonly occurs at the recipient areas, but can also occur at the donor sites in some patients, regardless of the hair transplant harvest technique. Fortunately, shock loss is almost always temporary with return of the affected hair within 3-4 months in most cases. All the best,