If there is still light blood after 21 days of total hysterectomy, it is mostly caused by slow wound healing or infection. 1. Some women’s wounds are slow to heal due to malnutrition or their own physical condition. 21 days after the total hysterectomy surgery, the wound has not completely healed, and sometimes a small amount of light blood will flow out due to the rupture of small blood vessels. 2. Inadequate sterilization during total hysterectomy or improper post-surgical care may lead to wound infection. The wound area is stimulated by inflammation, and sometimes there will be a faint flow of blood. If there is still blood coming out 21 days after the operation, women should consult a doctor in time to find out the cause and take targeted treatment measures.