Histopathologically, sebaceous glands have openings in the skin, so even larger sebaceous glands will always have adhesions with the skin around the original opening, and the larger the cyst, the wider the adhesions around the opening. If skin incision is made in this area, it is very easy to cut the pericardium together. In fact, to ensure the removal of the envelope as much as possible and to reduce the recurrence of sebaceous cysts, the adherent skin around the opening needs to be removed as well, and a sharp separation between the subcutaneous fat and the cyst envelope from outside the adherent area can easily remove the envelope, and the cyst rarely ruptures. The opening and the adherent skin are usually in the center of the raised skin, so if the incision in the middle of the swelling is not chosen and the incision does not completely cover the opening and all the adherent skin around the opening, it is difficult to achieve the intraoperative unbroken cyst or complete removal of the envelope. During surgical excision, the skin is excised in a pike shape with the cyst as the center and the blade is used to free the skin in all directions, avoiding vertical incision to prevent the cyst from being cut. To the fat layer, then free the cyst from left to right and strive not to break, if broken, cauterize the cyst wall with iodophor to prevent recurrence.