Circumcision penis hematoma belongs to the postoperative complications, the cause is mainly and wound bleeding and vascular injury is closely related to the local blood stasis will have corresponding changes. 1. Wound oozing: After circumcision, the wound hemostasis is not good, which will lead to the continuous oozing of blood, and the accumulation of blood under the skin will lead to the formation of hematoma. 2. Vascular injury: during circumcision, there is a possibility that small local capillaries may rupture, resulting in persistent bleeding, and poorly controlled hematomas may also form. Overall hematoma formation is also affected by the condition of the body’s coagulation function, and deviation of the coagulation function is more likely to lead to the formation of hematoma. Continuous bleeding after circumcision, hematoma enlargement, resulting in abnormalities in the surrounding tissue conditions, you need to contact your doctor for a timely checkup and follow the doctor’s instructions for standardized treatment.