The hardness of thigh liposuction may be caused by scar formation, poor blood circulation and infection. 1. Scar formation: Thigh liposuction is an invasive operation, which will leave an incision. Scars will be formed during the healing process of the incision, which will make you feel hard locally. 2. Poor blood circulation: After thigh liposuction, pressure bandage is usually applied, which may cause poor local blood circulation. There will be obstruction of blood return in the pressurized area, bruising and swelling, which will make the thighs feel hard. 3. Infection: Liposuction surgery is long, if you don’t pay attention to the aseptic operation, it may cause wound infection, resulting in thigh congestion, edema, hardness. If the thigh liposuction hardness occurs, it is recommended to go to the hospital in time, after the doctor examines and clarifies the cause of the disease, and follow the doctor’s instructions for treatment.