Lipo knife surgery will not affect your menstrual cycle and your period will come normally. Lipo knife surgery is mainly used to treat cervical erosion. The surgery is performed 2-3 days after menstruation, when there is less vaginal discharge and the surgical wound has basically healed by the time the next menstruation comes. About half a month after the surgery, the scabs of the surgical sores fall off and a small amount of vaginal bleeding may occur, but this is not menstruation and the amount and duration of bleeding is less than that of menstruation. You should not have intercourse, take a tub bath, or bend over to lift heavy objects or do heavy work for half a month after the surgery. Theoretically, Lipo knife surgery does not affect the menstrual cycle and menstruation will come on time. If your period comes at the same time as the surgical scabs fall off, it will cause increased vaginal bleeding, which is a normal physiological reaction.