Twelve days after delivery, the discharge is almost clean and there is fresh blood is usually a normal phenomenon, but it may also be due to the incision crack, poor uterine contraction and other reasons. 1. Normal phenomenon: It may be due to the fact that the twelve days postpartum is in the recovery period, the prenatal delivery injury is not fully recovered, or the incision is not fully healed after the surgery, etc., resulting in the twelve days postpartum dew almost clean and fresh blood, which is generally normal phenomenon during the recovery period after the operation. 2. Cracked incision: generally due to poor post-partum incision suture, post-partum strenuous exercise or constipation and other reasons, resulting in the incision is affected and cracked, and then there is the situation that the discharge is almost clean and there is fresh blood. 3. Poor uterine contraction: usually due to lack of nutrition or excessive tension after delivery, causing poor uterine contraction, when the uterus is still in the period of repair, so there is a situation that the discharge is almost clean and there is fresh blood. Fresh blood after 12 days may also be related to infection of the uterine cavity and endocrine disorders, so you should go to the hospital in time for examination and treatment under the judgment of the doctor.