There is a small hole in the fracture and it is still bleeding after 4 days in plaster, considering secondary injury, wound infection, diabetes and so on. 1. secondary injury: there is a small hole in the fracture, considering open fracture, before fixing the plaster is required to carry out wound debridement, generally 4 days when there is no bleeding, but if the fracture is not strict rest, again by the collision, or do a strenuous exercise, it will lead to wound reopening and bleeding. 2. Wound infection: If you don’t pay attention to the cleanliness and hygiene of the wound area after tying the plaster, and stay in the polluted environment for a long time, it will cause the wound to be infected, which will affect the healing of the wound, and the wound will bleed again. 3. Diabetes: If the patient’s blood sugar level is high, it will lead to low immunity and poor blood circulation, which will also affect the healing of the wound, so there will be bleeding. There is a small hole in the fracture tied to the cast for 4 days and bleeding, should be timely hospital treatment, pay attention to maintain local cleanliness and hygiene.