It is normal to have stomach pain on day 3 of a medical abortion. The pain in the stomach is considered to be the pain of contraction of the uterus after miscarriage, which is common after miscarriage. Generally, there will be a small amount of bleeding and mild abdominal pain within 1 week after miscarriage, and most of them will not disappear on their own for more than 1 week, and the pain will not be very strong. After a medical abortion, routine anti-inflammatory treatment with antibiotics is needed, along with drugs that activate blood circulation and remove blood stasis to promote contraction of the uterus and help expel accumulated blood. If the pain persists for more than 1 week, you need to consider going to the hospital for ultrasound examination to observe the specific situation inside the uterine cavity, and then consider targeted symptomatic treatment.