There is usually no significant pain or discomfort when the VSD is removed after implant surgery. VSD negative pressure drainage is the use of a biofilm with negative pressure drainage. It works by suctioning out necrotic as well as purulent tissue, promoting granulation growth and covering the wound, and is often used for skin defects as well as infected wounds. The advantage of VSD treatment is that it can quickly transform the contaminated tissue into clean tissue, and make the granulation grow a lot, so as to prepare the soft tissue bed for soft tissue grafting and skin grafting, which is one of the clinically very effective means of treating this kind of disease. Skin grafting area has basically healed: after skin grafting surgery + VSD negative pressure drainage, generally in a week when the wound can be basically healed, and at this time the basic VSD negative pressure drainage device is also basically ineffective, at this time you need to carry out the VSD removal operation. Since the wound has basically healed, there will be no obvious pain or discomfort.