Compared with hyaluronic acid and silicone materials, autologous fat has the advantages of convenient material extraction, no immune rejection and realistic handfeel, etc. However, no technology is flawless. If the hospital management is not strict enough, the doctor’s technique is not standardized or the post-operative care is not proper, it may cause a series of adverse consequences. 1.Infection Infection may occur after 5-7 days after surgery, which is manifested as local redness, swelling and heat pain in the hip injection area, and it is necessary to seek medical treatment as soon as possible. 2. Bleeding Damage to blood vessels during liposuction operation may cause bleeding, and if the damage is too great, a hematoma may be formed. 3.Fat liquefaction Too much fat tissue is injected, or the fat tissue naturally gathers into a lump after injection, resulting in necrosis and liquefaction of the injected fat as a result. 4.Nodules The injected fat particles are agglomerated and wrapped by fibrous tissues called spheres, and nodules will be formed by inactivation and calcification of fat cells, which usually have no uncomfortable symptoms and can be removed at the hospital. 5.Poor shape Due to uneven absorption of fat, the amount of absorption varies, resulting in local depression or asymmetry of the buttocks twice. 6.Cystic-like changes If a large amount of fibers and necrotic tissues are mixed in when the fat cells are extracted, some of the fat is denatured and fibrotic after injection grafting, calcified and forms a late cystic wall, which is surrounded by liquefied fat, which then needs to be surgically removed at the hospital. 7, fat tumor After injection grafting fat particles if gathered into a block, may stimulate the host cell transformation proliferation into lipoma, the occurrence of this situation need to consult a doctor’s advice as soon as possible. Here, plastic surgery experts again reminded many beauty lovers, choose plastic surgery, must go to the regular medical institutions.