Red blood and stomach pain in early pregnancy may be caused by gynecological diseases or abnormal pregnancy. 1. Gynecological diseases: cervical polyps or uterine submucous fibroids will have vaginal bleeding and stomach pain symptoms, gynecological examination or ultrasound can be clearly diagnosed. 2. Abnormal pregnancy: (1) Pre-eclampsia: vaginal bleeding and stomach pain will appear in the early stage of pregnancy, ultrasound examination is clear intrauterine pregnancy, or accompanied by blood in the uterine cavity, if you can’t carry out timely fertility preservation treatment, there is a possibility of developing into incomplete abortion, increased bleeding, or see the tissue-like things discharged from the vagina. (2) Ectopic pregnancy: In the early stage of pregnancy, irregular vaginal bleeding occurs, which may be accompanied by pain in the lower abdomen, and when there is a lot of intra-abdominal bleeding, there will be a decrease in blood pressure or hemorrhagic shock. Women should pay attention to personal hygiene and maintain a good mood after pregnancy. If there is any abdominal pain or vaginal bleeding, go to the hospital in time, and be given relevant examination by professional doctors to clarify the cause of the disease and then target treatment.