2. Prepare dermal tissue flap. After the epidermal layer was removed by trapezoidal incision line, it was cut at the upper edge of areola. Both ends of the incision extend upward along the two sides of the trapezoid respectively, reaching the inframammary fold and the incision reaching the subcutaneous layer.

3. Expose the glandular tissue, avoid the trapezoidal area, cut off the whole skin along the crescent incision line, and then lift the epithelial flap to expose the glandular tissue.

4. Remove part of the internal gland tissue. According to the gland size, the upper internal gland tissue was cut down in an S shape along the upper inner edge of areola and the inner edge of dermal tissue flap, and the gland wound was closed and sutured.

5. Put the nipple in a new position, cut a hole along the design line in the new position of the nipple, lift the nipple under the upper flap and lead it out of the hole, and fix the seam edge.

6. Close the incision. Dermal tissue flap is too long, which can be folded and shaped properly, and fixed with 1 ~ 2 needles. Then, the upper flap is pulled down and covered, and the edge of the flap is aligned with the edge of the lower incision for suture. Note that the pedicle suture of dermal tissue flap should be shallow and as little as possible, so as not to affect blood supply.

7. Place a negative pressure drainage tube to cut the 30cm-long anterior segment of latex tube (10cm) into two halves, place them on the same side and the opposite side of the skin flap respectively, and cut the head on the same side by 3cm；; The rear section of the tube is led out from another puncture hole in the lateral chest wall (connected with a negative pressure suction device after returning to the ward).

8. The whole breast is wrapped in a thick layer of dressing under pressure.