The hair should be combed with a brush used for washing the hands, soaked in detergent solution (chlorhexidine or polyvinyl-pyrrolidone), so as to facilitate the shaving that should be performed up to 2 cm from the region of the surgical incision.

The shaving just prior to surgery allows the better fixating of fields, the reduction of infection risks and a better fixation of the bandage after surgery. Once the area has been shaved, it is treated with ether-soaked gauze to remove the fat of the scalp and facilitate the fixation of fields and the marking of the incision area with methylene blue. Shaving can also be performed following only the incision line, with a width of about 2 cm.