To transplant hair, the surgeon first cleans the scalp, then injects an anesthetic to numb the area where a 3- to 4-inch strip of scalp will be removed. After removing the strip of scalp with a scalpel, the surgeon sets it aside and sews the scalp closed. This area is immediately hidden by the hair around it.
Next, the surgeon divides the strip of removed scalp into approximately 500 to 2,000 tiny grafts containing an individual hair or just a few hairs each. The number and type of graft used depends on the hair type, quality, and color as well as the size of the field where it will be transplanted.

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