Vague pain on the right side of the abdomen in early pregnancy. First, we should exclude the occurrence of ectopic pregnancy on the right side; second, it may be caused by inflammation of the right adnexa, pelvic inflammation or ovarian cyst, corpus luteum cyst, appendicitis, etc.; third, if the woman is pregnant in utero, it may be due to the pulling pain caused by the ligaments and muscles of the right adnexal area being pulled after the uterus has increased in size; fourth, when the woman gets cold or consumes unclean food, she may have vague pain on the right side. The vague pain on the right side may also occur. When women have vague pain on the right side in early pregnancy, it is best to go to the hospital in time for gynecological ultrasound, blood tests for HCG and progesterone and other related tests, and give treatment as soon as possible under the guidance of the doctor to avoid affecting the health of pregnant women.