The sudden onset of menstruation after the surgery is scheduled is uncontrollable with medication, but medication can reduce the amount and duration of menstruation. Certain gynecologic surgeries are chosen to be performed 3-7 days after the period has cleared, and your doctor will not choose to perform the surgery before the onset of your period. Sudden onset of menstruation after surgery has been scheduled may be due to abnormal uterine bleeding, in which case it may be better to perform the surgery after menstruation has cleared if it is not a particularly urgent procedure. Most gynecological surgeries for women, such as fibroid removal or total hysterectomy, are performed 3-7 days after menstruation. It is important to be in a good mood and have a regular schedule before the surgery to avoid any emotional instability that may cause menstrual disorders and sudden onset of menstruation.