(1) purse-string suture nipple plasty: a circular incision with a diameter of 1.5 ~ 2.0 cm was designed in the center of areola, and the skin was cut and pulled. Make a circular incision around the deep nipple of each flap with a sharp knife, loosen the tight smooth muscle fibers, pull out the invaginated nipple, and make purse-string suture and tension knot on the upper edge skin. Proper intensity to avoid blood supply disorder. Then sew the two sides together to form a new nipple.

(2) Spindle incision nipple reconstruction: make a spindle incision in the breast monitor heart, loosen the tight smooth muscle fibers, pull out the invaginated nipple, separate the 1/3 flaps on both sides, keep the central 1/3 blood supply belt, and then sew it to the center to form a new nipple.

(3) diamond-shaped excision of breast skin: draw a circle with a diameter of 3cm with the nipple as the center, mark three diamond-shaped incisions at equal intervals inside and outside the circle, and cut off the skin and subcutaneous tissue in the diamond to form three pedicled flaps. Pull the nipple through the invaginated nipple with a traction thread, make a circular incision around the nipple with a sharp knife to relax the tight smooth muscle fibers, pull out the invaginated nipple, make purse-string suture under the skin through three incisions, and then sew the diamond incision.