Swelling fluid is usually metabolized 1-3 days after surgery. Swelling fluid has two functions. The first is when liposuction will be injected with swelling fluid, its role is mainly to anesthetize and separate fat and subcutaneous tissue and so on, mix the fat in the swelling fluid, it is easier to suck out through the suction tube, and in the liquid state it is easier to mash and suck out the fat gradually, and the swelling fluid will generally add the ingredients of local anesthetic drugs to make less bleeding, and the patient’s pain is not so obvious. The second place where swelling solution is used is during skin removal, before the skin is removed from the body, swelling solution is usually injected under the skin to hold up the skin, and the skin forms a flat surface after the swelling solution is injected, which is conducive to skin removal, and at this time, hemostatic ingredients are added to the swelling solution, so that bleeding is not particularly high during skin removal, and it is conducive to postoperative dressing and recovery of the implant area.