Normal usage and dosage will not cause severe bleeding. If severe bleeding occurs, heparin should be stopped immediately, and six coagulation tests should be urgently performed. Meanwhile, vitamin K1, protamine sulfate, etc. should be used for rescue. The prerequisite is to exclude contraindications such as allergy to this drug, spontaneous bleeding tendency, delayed blood coagulation, and severe liver insufficiency. Treatment methods for bleeding caused by heparin injection: 1. If it is only a small amount of bleeding, there is no need to worry too much. Taking two vitamin C tablets in the morning, noon, and evening can quickly alleviate it. 2. If the bleeding volume is large, the heparin dosage can be reduced to the minimum, and the interval time can be extended. If the bleeding volume is still high, heparin can be suspended. When bleeding stops, it can be resumed, but attention should be paid to using a smaller dosage and a longer interval. 3. Bleeding caused by heparin may also be due to improper dosage. Excessive use of heparin may lead to bleeding. If severe bleeding occurs, it should be checked, and vitamin K1 can be used for rescue. 4. Bleeding caused by heparin may be due to allergies or may occur in people with a spontaneous bleeding tendency. If someone has bleeding caused by heparin, they should not use it again.