Bleeding in early pregnancy but no stomach pain may be caused by miscarriage, ectopic pregnancy, cervicitis and other diseases, or vaginitis, cervical polyps and other diseases. 1. Miscarriage: Considering that it is caused by many factors such as embryo and environment, patients will have symptoms such as vaginal bleeding and menopause, and paroxysmal abdominal pain will occur after the embryo is expelled. Therefore, the patient will have the manifestation of bleeding in early pregnancy but no pain in the stomach. 2. Ectopic pregnancy: the cause of ectopic pregnancy is caused by salpingitis and abnormal development of the fallopian tube, patients have no obvious symptoms in the early stage, and vaginal bleeding will occur after the death of the embryo, so the patients will have bleeding in the early stage of pregnancy but no pain in the stomach. 3. Cervicitis: cervicitis is caused by bacteria, viruses and other pathogens infecting the cervix, patients will have abnormal vaginal bleeding, vulvar itching and other symptoms, so patients will have early pregnancy bleeding but no pain in the stomach. 4. Other: vaginitis, cervical polyps and other diseases can also lead to the phenomenon of early pregnancy bleeding but no pain in the stomach. Therefore, when patients have symptoms of bleeding in early pregnancy but no pain in the stomach, they should go to the hospital in time for examination, to clarify the cause of the disease, and then follow the doctor’s instructions for treatment.