You can remove a halo nevus if you want. The skin with the nevus will be removed and the edges of the formed wound will be sutured to create a scar as small as possible. The scar will be smaller or bigger depending upon the nevus’s dimensions, the surgeon’s skills and possible complications such as infection. There is no way you can avoid a scar from forming. By preventing a wound infection you can achieve a scar as small as possible. You can consult a plastic surgeon about this problem.