Heparin injections may cause uterine bleeding. Heparin injections may cause uterine bleeding, for example, heparin treatment during pregnancy carries an increased risk of bleeding, especially during labor and delivery, and should be used with caution. Also older women over the age of 60 are more sensitive to heparin and are more likely to bleed during use, and should reduce the dosage and increase monitoring during use. Heparin injection is a prescription drug and must be used under the supervision of a doctor, who should be informed of the history of allergies, symptoms, illnesses, and recent medications, and who should rule out any contraindications to the use of the medication under the supervision of the doctor. It should also be noted that if there are other uncomfortable symptoms (such as pain in the lower back and abdomen, etc.), then you need to consider other related causes of uterine bleeding, such as cervical polyps, cervicitis, etc., which should be promptly consulted by the doctor to clarify the cause of the disease, and then give targeted treatment.