The different heights of the lower crease after breast augmentation may be caused by improper surgical operation, or caused by the patient lifting heavy objects, or caused by periosteal contracture. 1. Improper operation: if the patient’s surgeon’s operation is not proper, it will lead to asymmetry of the patient’s implant placement, so it may lead to the phenomenon that the patient’s lower crease is not the same height after breast augmentation. 2. Lifting heavy objects: if the patient lifts heavy objects after breast augmentation surgery before recovery, or often uses one side of the arm to work, it may also lead to different heights of the lower crease after breast augmentation surgery. 3. Periosteum contracture: Periosteum contracture belongs to the complications after breast augmentation surgery, which will lead to the phenomenon of different heights of the lower crease after breast augmentation. In addition, patients will also have symptoms such as localized breast hardness and pain. When the patient has the phenomenon of different height of the crease after breast augmentation surgery, he should go to the hospital in time to find out the reason and take specific treatment measures under the guidance of the doctor.